pentoo-desktop: s/mupdf/evince/ for xfce users, mupdf seems too be lacking too much to not have evince as default

git-svn-id: http://pentoo.googlecode.com/svn@6132 04556701-5d27-2e10-b29c-201e0903c0fa
pentoo-desktop: keep mupdf since it can read pdf 1.4 and evince can't

git-svn-id: http://pentoo.googlecode.com/svn@6133 04556701-5d27-2e10-b29c-201e0903c0fa
drop old

git-svn-id: http://pentoo.googlecode.com/svn@6134 04556701-5d27-2e10-b29c-201e0903c0fa