gtk: remove 0001-REBURN-THE-DEF-FILE.mingw.patch which is now upstream
gtk: add patch to avoid using win32 theme

This is to be able to compile with the latest gtk release. This
is already fixed upstream but we will need a new release to be
able to actually remove this patch.
gtk: update to 3.13.5
Merge pull request #85 from nacho/wip/gtk

Wip/gtk