Hide remaining non-critical GDL warnings. These will stop being our problem after Gtk+ 3 migration
Fixing regression
Explicitly test for -Wno-unused-but-set-variable compiler option
Working with widjets
Only suppress compiler warnings for GDL if option is supported
Suppress non-critical compiler warnings for GDL. We are dropping our fork eventually, so let's keep it frozen if possible.
Files in /src that no longer exist
Add --enable-gtk3-experimental build + use external GDL if possible
Merge upstream GDL: GNOME_2_30_0
Merge upstream GDL 0.7.8 changes
Merge from trunk
Removed libgdl component not used by Inkscape.
Dockable dialogs patch applied (https://sourceforge.net/tracker/?func=detail&atid=604308&aid=1688508&group_id=93438)