Minor compilation fix.
Didnt't mean to push that... Fix compilation.
Merge branch 'full-rewrite-wpf' into full-rewrite
Simplify code for the special GTK+ input.
Fix stupid mistake in bitfield test.
Implement discard_on_invalid and beep_on_invalid options.
Save current language in configuration file even though we don't support it yet.
Clean implementation of GetDataDir() that takes into account that the
executable may be running under Visual Studio.
Build preliminary logic for sequence file loading.