src/dialogs.c, src/about.c, src/callbacks.c, configure.in: rewrote about dialog to reduce code size, added subversion revision
src/highlighting.c: bugfix


git-svn-id: https://geany.svn.sourceforge.net/svnroot/geany/trunk@352 ea778897-0a13-0410-b9d1-a72fbfd435f5