Unfinished, more work needed in:
* command-line arguments (grafx2 myimage.pcx -width 640 -height 480)
* querying SDL for best modes
* detecting bad modes and recovering (though shift+return restores to window)
* saving settings in gfx2.ini.
Also, now the window's close button triggers Quit. Both events (quit, resize)
are only taken into account when all menus are closed.
git-svn-id: svn://pulkomandy.tk/GrafX2/trunk@188 416bcca6-2ee7-4201-b75f-2eb2f807beb1
