Split out download page (text was heavily augmented). Also:
- Split out common-navigation.xml to share with index.xhtml, added IDs to all navigation elements
- Fix transparency problems with floated logo
- Cleanup abbr/acronym CSS declarations
- Added AutoStyle DOMFilter, which eliminates need to manually specify stylesheet inclusions (expect to see more extensions in this vein)
- Refactor/rename directory handling code, add directory instance to Page.php
- Add toc-base to base ul list in table of contents
git-svn-id: http://htmlpurifier.org/svnroot@1148 48356398-32a2-884e-a903-53898d9a118a