Fix so font cache deleted when changing themes and after applying update

git-svn-id: http://svn.slightlymagic.net/forge/trunk@26311 269b9781-a132-4a9b-9d4e-f004f1b56b58
Version bump to 1.5.20.006

git-svn-id: http://svn.slightlymagic.net/forge/trunk@26312 269b9781-a132-4a9b-9d4e-f004f1b56b58
Fix rendering of mana cost for split cards

git-svn-id: http://svn.slightlymagic.net/forge/trunk@26313 269b9781-a132-4a9b-9d4e-f004f1b56b58
Cleanup graphics code

git-svn-id: http://svn.slightlymagic.net/forge/trunk@26314 269b9781-a132-4a9b-9d4e-f004f1b56b58