gtk2: Rebuild with fixed gobject-introspection.
gtk3: Rebuild with fixed gobject-introspection.
gtk-doc: Update to 1.20
glade: Rebuild with fixed gobject-introspection
docbook-xsl: Refactoring
mingw-w64: Update runtime to revision 6505
meld3: Add new dependency
ffmpeg: Update to 2.1.4
gimp: Fix finding python.