Item12863: Version 2 of PatchFoswikiContrib

This new version elimnates obsolete patches to reduce noise when
installing on Foswiki 1.2.

Missing file PREUNINSTALL was added, and a small bug was fixed.  The
patches were uninstalled in the wrong order, so it was possible that
patches would fail to revert.

git-svn-id: http://svn.foswiki.org/trunk/PatchFoswikiContrib@17573 0b4bb1d4-4e5a-0410-9cc4-b2b747904278