Use complete Debian revision number as build number, instead of
just the numeric part. Also, re-implement scripts/time-stamper.bash
without direct calls to dpkg-parsechangelog.
The following patches have been dropped:
01-libpng15.patch
06-remove-encoding-from-desktop-file.patch
07-fix-spelling-errors-in-binaries.patch
09-fix-format-security-warnings.patch
21-fix-privacy-breach-in-doco.patch
