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  32           <h3>License</h3>
  33           <p>
  34             Copyright &copy 2008 - 2011 Bert Burgemeister
  35           <p>
  36           </p>
  37           Permission is granted to copy, distribute and/or modify this
  38           document under the terms of the <a href="http://www.gnu.org/licenses/fdl.html">GNU Free Documentation License</a>,
  39           Version 1.2 or any later version published by the Free Software
  40           Foundation; with no Invariant Sections, no Front-Cover Texts and
  41           no Back-Cover Texts.
  42           <p>
  43             &nbsp;
  44           <p>
  45             &nbsp;
  46           <p>
  47             &nbsp;
  48           <p>
  49             <h3><a href="http://www.gnu.org/licenses/fdl.html">GNU Free Documentation License</a></h3>
  50           <p>
  51             Version 1.2, November 2002
  52           </p>
  53
  54           <pre>Copyright (C) 2000,2001,2002  Free Software Foundation, Inc.</pre>
  55           <pre>51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA</pre>
  56           <pre>Everyone is permitted to copy and distribute verbatim copies</pre>
  57           <pre>of this license document, but changing it is not allowed.</pre>
  58
  59           <p>
  60             <h4>0. PREAMBLE</h4>
  61           </p>
  62
  63           <p>
  64             The purpose of this License is to make a manual, textbook, or other
  65             functional and useful document "free" in the sense of freedom: to
  66             assure everyone the effective freedom to copy and redistribute it,
  67             with or without modifying it, either commercially or noncommercially.
  68             Secondarily, this License preserves for the author and publisher a way
  69             to get credit for their work, while not being considered responsible
  70             for modifications made by others.
  71           </p>
  72
  73           <p>
  74             This License is a kind of "copyleft", which means that derivative
  75             works of the document must themselves be free in the same sense.  It
  76             complements the GNU General Public License, which is a copyleft
  77             license designed for free software.
  78           </p>
  79
  80           <p>
  81             We have designed this License in order to use it for manuals for free
  82             software, because free software needs free documentation: a free
  83             program should come with manuals providing the same freedoms that the
  84             software does.  But this License is not limited to software manuals;
  85             it can be used for any textual work, regardless of subject matter or
  86             whether it is published as a printed book.  We recommend this License
  87             principally for works whose purpose is instruction or reference.
  88           </p>
  89
  90           <p>
  91             <h4>1. APPLICABILITY AND DEFINITIONS</h4>
  92           </p>
  93
  94           <p>
  95             This License applies to any manual or other work, in any medium, that
  96             contains a notice placed by the copyright holder saying it can be
  97             distributed under the terms of this License.  Such a notice grants a
  98             world-wide, royalty-free license, unlimited in duration, to use that
  99             work under the conditions stated herein.  The "Document", below,
 100             refers to any such manual or work.  Any member of the public is a
 101             licensee, and is addressed as "you".  You accept the license if you
 102             copy, modify or distribute the work in a way requiring permission
 103             under copyright law.
 104           </p>
 105
 106           <p>
 107             A "Modified Version" of the Document means any work containing the
 108             Document or a portion of it, either copied verbatim, or with
 109             modifications and/or translated into another language.
 110           </p>
 111
 112           <p>
 113             A "Secondary Section" is a named appendix or a front-matter section of
 114             the Document that deals exclusively with the relationship of the
 115             publishers or authors of the Document to the Document's overall subject
 116             (or to related matters) and contains nothing that could fall directly
 117             within that overall subject.  (Thus, if the Document is in part a
 118             textbook of mathematics, a Secondary Section may not explain any
 119             mathematics.)  The relationship could be a matter of historical
 120             connection with the subject or with related matters, or of legal,
 121             commercial, philosophical, ethical or political position regarding
 122             them.
 123           </p>
 124
 125           <p>
 126             The "Invariant Sections" are certain Secondary Sections whose titles
 127             are designated, as being those of Invariant Sections, in the notice
 128             that says that the Document is released under this License.  If a
 129             section does not fit the above definition of Secondary then it is not
 130             allowed to be designated as Invariant.  The Document may contain zero
 131             Invariant Sections.  If the Document does not identify any Invariant
 132             Sections then there are none.
 133           </p>
 134
 135           <p>
 136             The "Cover Texts" are certain short passages of text that are listed,
 137             as Front-Cover Texts or Back-Cover Texts, in the notice that says that
 138             the Document is released under this License.  A Front-Cover Text may
 139             be at most 5 words, and a Back-Cover Text may be at most 25 words.
 140           </p>
 141
 142           <p>
 143             A "Transparent" copy of the Document means a machine-readable copy,
 144             represented in a format whose specification is available to the
 145             general public, that is suitable for revising the document
 146             straightforwardly with generic text editors or (for images composed of
 147             pixels) generic paint programs or (for drawings) some widely available
 148             drawing editor, and that is suitable for input to text formatters or
 149             for automatic translation to a variety of formats suitable for input
 150             to text formatters.  A copy made in an otherwise Transparent file
 151             format whose markup, or absence of markup, has been arranged to thwart
 152             or discourage subsequent modification by readers is not Transparent.
 153             An image format is not Transparent if used for any substantial amount
 154             of text.  A copy that is not "Transparent" is called "Opaque".
 155           </p>
 156
 157           <p>
 158             Examples of suitable formats for Transparent copies include plain
 159             ASCII without markup, Texinfo input format, LaTeX input format, SGML
 160             or XML using a publicly available DTD, and standard-conforming simple
 161             HTML, PostScript or PDF designed for human modification.  Examples of
 162             transparent image formats include PNG, XCF and JPG.  Opaque formats
 163             include proprietary formats that can be read and edited only by
 164             proprietary word processors, SGML or XML for which the DTD and/or
 165             processing tools are not generally available, and the
 166             machine-generated HTML, PostScript or PDF produced by some word
 167             processors for output purposes only.
 168           </p>
 169
 170           <p>
 171             The "Title Page" means, for a printed book, the title page itself,
 172             plus such following pages as are needed to hold, legibly, the material
 173             this License requires to appear in the title page.  For works in
 174             formats which do not have any title page as such, "Title Page" means
 175             the text near the most prominent appearance of the work's title,
 176             preceding the beginning of the body of the text.
 177           </p>
 178
 179           <p>
 180             A section "Entitled XYZ" means a named subunit of the Document whose
 181             title either is precisely XYZ or contains XYZ in parentheses following
 182             text that translates XYZ in another language.  (Here XYZ stands for a
 183             specific section name mentioned below, such as "Acknowledgements",
 184             "Dedications", "Endorsements", or "History".)  To "Preserve the Title"
 185             of such a section when you modify the Document means that it remains a
 186             section "Entitled XYZ" according to this definition.
 187           </p>
 188
 189           <p>
 190             The Document may include Warranty Disclaimers next to the notice which
 191             states that this License applies to the Document.  These Warranty
 192             Disclaimers are considered to be included by reference in this
 193             License, but only as regards disclaiming warranties: any other
 194             implication that these Warranty Disclaimers may have is void and has
 195             no effect on the meaning of this License.
 196           </p>
 197
 198           <p>
 199             <h4>2. VERBATIM COPYING</h4>
 200           </p>
 201
 202           <p>
 203             You may copy and distribute the Document in any medium, either
 204             commercially or noncommercially, provided that this License, the
 205             copyright notices, and the license notice saying this License applies
 206             to the Document are reproduced in all copies, and that you add no other
 207             conditions whatsoever to those of this License.  You may not use
 208             technical measures to obstruct or control the reading or further
 209             copying of the copies you make or distribute.  However, you may accept
 210             compensation in exchange for copies.  If you distribute a large enough
 211             number of copies you must also follow the conditions in section 3.
 212           </p>
 213
 214           <p>
 215             You may also lend copies, under the same conditions stated above, and
 216             you may publicly display copies.
 217           </p>
 218
 219           <p>
 220             <h4>3. COPYING IN QUANTITY</h4>
 221           </p>
 222
 223           <p>
 224             If you publish printed copies (or copies in media that commonly have
 225             printed covers) of the Document, numbering more than 100, and the
 226             Document's license notice requires Cover Texts, you must enclose the
 227             copies in covers that carry, clearly and legibly, all these Cover
 228             Texts: Front-Cover Texts on the front cover, and Back-Cover Texts on
 229             the back cover.  Both covers must also clearly and legibly identify
 230             you as the publisher of these copies.  The front cover must present
 231             the full title with all words of the title equally prominent and
 232             visible.  You may add other material on the covers in addition.
 233             Copying with changes limited to the covers, as long as they preserve
 234             the title of the Document and satisfy these conditions, can be treated
 235             as verbatim copying in other respects.
 236           </p>
 237
 238           <p>
 239             If the required texts for either cover are too voluminous to fit
 240             legibly, you should put the first ones listed (as many as fit
 241             reasonably) on the actual cover, and continue the rest onto adjacent
 242             pages.
 243           </p>
 244
 245           <p>
 246             If you publish or distribute Opaque copies of the Document numbering
 247             more than 100, you must either include a machine-readable Transparent
 248             copy along with each Opaque copy, or state in or with each Opaque copy
 249             a computer-network location from which the general network-using
 250             public has access to download using public-standard network protocols
 251             a complete Transparent copy of the Document, free of added material.
 252             If you use the latter option, you must take reasonably prudent steps,
 253             when you begin distribution of Opaque copies in quantity, to ensure
 254             that this Transparent copy will remain thus accessible at the stated
 255             location until at least one year after the last time you distribute an
 256             Opaque copy (directly or through your agents or retailers) of that
 257             edition to the public.
 258           </p>
 259
 260           <p>
 261             It is requested, but not required, that you contact the authors of the
 262             Document well before redistributing any large number of copies, to give
 263             them a chance to provide you with an updated version of the Document.
 264           </p>
 265
 266           <p>
 267             <h4>4. MODIFICATIONS</h4>
 268           </p>
 269
 270           <p>
 271             You may copy and distribute a Modified Version of the Document under
 272             the conditions of sections 2 and 3 above, provided that you release
 273             the Modified Version under precisely this License, with the Modified
 274             Version filling the role of the Document, thus licensing distribution
 275             and modification of the Modified Version to whoever possesses a copy
 276             of it.  In addition, you must do these things in the Modified Version:
 277           </p>
 278
 279           <ul>
 280             <li><h4>A.</h4> Use in the Title Page (and on the covers, if any) a title distinct
 281               from that of the Document, and from those of previous versions
 282               (which should, if there were any, be listed in the History section
 283               of the Document).  You may use the same title as a previous version
 284               if the original publisher of that version gives permission.</li>
 285             <li><h4>B.</h4> List on the Title Page, as authors, one or more persons or entities
 286               responsible for authorship of the modifications in the Modified
 287               Version, together with at least five of the principal authors of the
 288               Document (all of its principal authors, if it has fewer than five),
 289               unless they release you from this requirement.</li>
 290             <li><h4>C.</h4> State on the Title page the name of the publisher of the
 291               Modified Version, as the publisher.</li>
 292             <li><h4>D.</h4> Preserve all the copyright notices of the Document.</li>
 293             <li><h4>E.</h4> Add an appropriate copyright notice for your modifications
 294               adjacent to the other copyright notices.</li>
 295             <li><h4>F.</h4> Include, immediately after the copyright notices, a license notice
 296               giving the public permission to use the Modified Version under the
 297               terms of this License, in the form shown in the Addendum below.</li>
 298             <li><h4>G.</h4> Preserve in that license notice the full lists of Invariant Sections
 299               and required Cover Texts given in the Document's license notice.</li>
 300             <li><h4>H.</h4> Include an unaltered copy of this License.</li>
 301             <li><h4>I.</h4> Preserve the section Entitled "History", Preserve its Title, and add
 302               to it an item stating at least the title, year, new authors, and
 303               publisher of the Modified Version as given on the Title Page.  If
 304               there is no section Entitled "History" in the Document, create one
 305               stating the title, year, authors, and publisher of the Document as
 306               given on its Title Page, then add an item describing the Modified
 307               Version as stated in the previous sentence.</li>
 308             <li><h4>J.</h4> Preserve the network location, if any, given in the Document for
 309               public access to a Transparent copy of the Document, and likewise
 310               the network locations given in the Document for previous versions
 311               it was based on.  These may be placed in the "History" section.
 312               You may omit a network location for a work that was published at
 313               least four years before the Document itself, or if the original
 314               publisher of the version it refers to gives permission.</li>
 315             <li><h4>K.</h4> For any section Entitled "Acknowledgements" or "Dedications",
 316               Preserve the Title of the section, and preserve in the section all
 317               the substance and tone of each of the contributor acknowledgements
 318               and/or dedications given therein.</li>
 319             <li><h4>L.</h4> Preserve all the Invariant Sections of the Document,
 320               unaltered in their text and in their titles.  Section numbers
 321               or the equivalent are not considered part of the section titles.</li>
 322             <li><h4>M.</h4> Delete any section Entitled "Endorsements".  Such a section
 323               may not be included in the Modified Version.</li>
 324             <li><h4>N.</h4> Do not retitle any existing section to be Entitled "Endorsements"
 325               or to conflict in title with any Invariant Section.</li>
 326             <li><h4>O.</h4> Preserve any Warranty Disclaimers.</li>
 327           </ul>
 328
 329           <p>
 330             If the Modified Version includes new front-matter sections or
 331             appendices that qualify as Secondary Sections and contain no material
 332             copied from the Document, you may at your option designate some or all
 333             of these sections as invariant.  To do this, add their titles to the
 334             list of Invariant Sections in the Modified Version's license notice.
 335             These titles must be distinct from any other section titles.
 336           </p>
 337
 338           <p>
 339             You may add a section Entitled "Endorsements", provided it contains
 340             nothing but endorsements of your Modified Version by various
 341             parties--for example, statements of peer review or that the text has
 342             been approved by an organization as the authoritative definition of a
 343             standard.
 344           </p>
 345
 346           <p>
 347             You may add a passage of up to five words as a Front-Cover Text, and a
 348             passage of up to 25 words as a Back-Cover Text, to the end of the list
 349             of Cover Texts in the Modified Version.  Only one passage of
 350             Front-Cover Text and one of Back-Cover Text may be added by (or
 351             through arrangements made by) any one entity.  If the Document already
 352             includes a cover text for the same cover, previously added by you or
 353             by arrangement made by the same entity you are acting on behalf of,
 354             you may not add another; but you may replace the old one, on explicit
 355             permission from the previous publisher that added the old one.
 356           </p>
 357
 358           <p>
 359             The author(s) and publisher(s) of the Document do not by this License
 360             give permission to use their names for publicity for or to assert or
 361             imply endorsement of any Modified Version.
 362           </p>
 363
 364           <p>
 365             <h4>5. COMBINING DOCUMENTS</h4>
 366           </p>
 367
 368           <p>
 369             You may combine the Document with other documents released under this
 370             License, under the terms defined in section 4 above for modified
 371             versions, provided that you include in the combination all of the
 372             Invariant Sections of all of the original documents, unmodified, and
 373             list them all as Invariant Sections of your combined work in its
 374             license notice, and that you preserve all their Warranty Disclaimers.
 375           </p>
 376
 377           <p>
 378             The combined work need only contain one copy of this License, and
 379             multiple identical Invariant Sections may be replaced with a single
 380             copy.  If there are multiple Invariant Sections with the same name but
 381             different contents, make the title of each such section unique by
 382             adding at the end of it, in parentheses, the name of the original
 383             author or publisher of that section if known, or else a unique number.
 384             Make the same adjustment to the section titles in the list of
 385             Invariant Sections in the license notice of the combined work.
 386           </p>
 387
 388           <p>
 389             In the combination, you must combine any sections Entitled "History"
 390             in the various original documents, forming one section Entitled
 391             "History"; likewise combine any sections Entitled "Acknowledgements",
 392             and any sections Entitled "Dedications".  You must delete all sections
 393             Entitled "Endorsements."
 394           </p>
 395
 396           <p>
 397             <h4>6. COLLECTIONS OF DOCUMENTS</h4>
 398           </p>
 399
 400           <p>
 401             You may make a collection consisting of the Document and other documents
 402             released under this License, and replace the individual copies of this
 403             License in the various documents with a single copy that is included in
 404             the collection, provided that you follow the rules of this License for
 405             verbatim copying of each of the documents in all other respects.
 406           </p>
 407
 408           <p>
 409             You may extract a single document from such a collection, and distribute
 410             it individually under this License, provided you insert a copy of this
 411             License into the extracted document, and follow this License in all
 412             other respects regarding verbatim copying of that document.
 413           </p>
 414
 415           <p>
 416             <h4>7. AGGREGATION WITH INDEPENDENT WORKS</h4>
 417           </p>
 418
 419           <p>
 420             A compilation of the Document or its derivatives with other separate
 421             and independent documents or works, in or on a volume of a storage or
 422             distribution medium, is called an "aggregate" if the copyright
 423             resulting from the compilation is not used to limit the legal rights
 424             of the compilation's users beyond what the individual works permit.
 425             When the Document is included in an aggregate, this License does not
 426             apply to the other works in the aggregate which are not themselves
 427             derivative works of the Document.
 428           </p>
 429
 430           <p>
 431             If the Cover Text requirement of section 3 is applicable to these
 432             copies of the Document, then if the Document is less than one half of
 433             the entire aggregate, the Document's Cover Texts may be placed on
 434             covers that bracket the Document within the aggregate, or the
 435             electronic equivalent of covers if the Document is in electronic form.
 436             Otherwise they must appear on printed covers that bracket the whole
 437             aggregate.
 438           </p>
 439
 440           <p>
 441             <h4>8. TRANSLATION</h4>
 442           </p>
 443
 444           <p>
 445             Translation is considered a kind of modification, so you may
 446             distribute translations of the Document under the terms of section 4.
 447             Replacing Invariant Sections with translations requires special
 448             permission from their copyright holders, but you may include
 449             translations of some or all Invariant Sections in addition to the
 450             original versions of these Invariant Sections.  You may include a
 451             translation of this License, and all the license notices in the
 452             Document, and any Warranty Disclaimers, provided that you also include
 453             the original English version of this License and the original versions
 454             of those notices and disclaimers.  In case of a disagreement between
 455             the translation and the original version of this License or a notice
 456             or disclaimer, the original version will prevail.
 457           </p>
 458
 459           <p>
 460             If a section in the Document is Entitled "Acknowledgements",
 461             "Dedications", or "History", the requirement (section 4) to Preserve
 462             its Title (section 1) will typically require changing the actual
 463             title.
 464           </p>
 465
 466           <p>
 467             <h4>9. TERMINATION</h4>
 468           </p>
 469
 470           <p>
 471             You may not copy, modify, sublicense, or distribute the Document except
 472             as expressly provided for under this License.  Any other attempt to
 473             copy, modify, sublicense or distribute the Document is void, and will
 474             automatically terminate your rights under this License.  However,
 475             parties who have received copies, or rights, from you under this
 476             License will not have their licenses terminated so long as such
 477             parties remain in full compliance.
 478           </p>
 479
 480           <p>
 481             <h4>10. FUTURE REVISIONS OF THIS LICENSE</h4>
 482           </p>
 483
 484           <p>
 485             The Free Software Foundation may publish new, revised versions
 486             of the GNU Free Documentation License from time to time.  Such new
 487             versions will be similar in spirit to the present version, but may
 488             differ in detail to address new problems or concerns.  See
 489             http://www.gnu.org/copyleft/.
 490           </p>
 491
 492           <p>
 493             Each version of the License is given a distinguishing version number.
 494             If the Document specifies that a particular numbered version of this
 495             License "or any later version" applies to it, you have the option of
 496             following the terms and conditions either of that specified version or
 497             of any later version that has been published (not as a draft) by the
 498             Free Software Foundation.  If the Document does not specify a version
 499             number of this License, you may choose any version ever published (not
 500             as a draft) by the Free Software Foundation.
 501           </p>
 502
 503           <h3>How to use this License for your documents</h3>
 504
 505           <p>
 506             To use this License in a document you have written, include a copy of
 507             the License in the document and put the following copyright and
 508             license notices just after the title page:
 509           </p>
 510
 511           <pre>Copyright (c)  YEAR  YOUR NAME.</pre>
 512           <pre>Permission is granted to copy, distribute and/or modify this document</pre>
 513           <pre>under the terms of the GNU Free Documentation License, Version 1.2</pre>
 514           <pre>or any later version published by the Free Software Foundation;</pre>
 515           <pre>with no Invariant Sections, no Front-Cover Texts, and no Back-Cover</pre>
 516           <pre>Texts.  A copy of the license is included in the section entitled "GNU</pre>
 517           <pre>Free Documentation License".</pre>
 518
 519           <p>
 520             If you have Invariant Sections, Front-Cover Texts and Back-Cover Texts,
 521             replace the "with...Texts." line with this:
 522           </p>
 523
 524           <pre>with the Invariant Sections being LIST THEIR TITLES, with the</pre>
 525           <pre>Front-Cover Texts being LIST, and with the Back-Cover Texts being LIST.</pre>
 526
 527           <p>
 528             If you have Invariant Sections without Cover Texts, or some other
 529             combination of the three, merge those two alternatives to suit the
 530             situation.
 531           </p>
 532
 533           <p>
 534             If your document contains nontrivial examples of program code, we
 535             recommend releasing these examples in parallel under your choice of
 536             free software license, such as the GNU General Public License,
 537             to permit their use in free software.
 538           </p>
 539
 540
 541           <p>
 542             Copyright notice above.<br />
 543             51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
 544             <br />
 545             Verbatim copying and distribution of this entire article is
 546             permitted in any medium without royalty provided this notice is
 547             preserved.
 548           </p>
 549
 550         </td>
 551       </tr>
 552       <tr>
 553         <td class="quicklinks" colspan="2">
 554           &nbsp;
 555         </td>
 556       </tr>
 557       <tr>
 558         <td class="footer" colspan="2">
 559           &copy; 2008 - 2011 &nbsp;
 560           <a href="mailto:trebbu@googlemail.com?subject=CLQR ">
 561             Bert Burgemeister
 562           </a>
 563         </td>
 564       </tr>
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