Matthew Brush 8184f91a8f Make GTK3 build default, and GTK2 build optional
* Replace `--enable-gtk3` with `--enable-gtk2`
* Update Travis CI builds
* Change `cross-build-mingw.sh` default to GTK3 and cleanup a little

After this commit it will be required to pass `--enable-gtk2` to
the Autoconf script in order to build with GTK+2, otherwise GTK+3
will be required.
2020-10-04 05:22:06 -07:00
..
2008-09-08 14:27:22 +00:00