Merge Debian packaging for release “1.5+dfsg.1-1”.

Merge Debian packaging for release “1.5+dfsg.1-1”.

* tag 'packaging/1.5+dfsg.1-1': (61 commits)
  Finalise release “1.5+dfsg.1-1”.
  Acknowledge NMU by David Prévot.
  Omit file ‘NORALUJV.txt’ which is not covered under grant of license to redistribute.
  Fix license grant for GPL-3.
  Update VCS fields following changes at Alioth.
  Declare “Standards-Version: 3.9.5”.
  Re-license original work under GPL-3+.
  Update copyright notices and declare copyright format version 1.0.
  Finalise release ‘1.5-6’.
  Conform to ‘Standards-Version: 3.9.3’.
  Finalise release 1.5-5.
  Actually, conforming with the newer Standards-Version entails using the recommended rules targets.
  Update copyright notices and reformat to current DEP-5 specification.
  Update copyright notices and other file metadata.
  Conform to ‘Standards-Version: 3.9.2’.
  Use current recommended rules targets.
  Allow Debhelper to figure out which document files need installing.
  Move ancient news about current filenames into the README.
  Prepare for development of subsequent release.
  Finalise release 1.5-4.
  ...