Big endian CDDA support. Uses Config.Cdda (previously bool). Now enum. Gtk gui was modified for new enum, but compatibility was kept so that other guis don't go nuts.

git-svn-id: https://pcsxr.svn.codeplex.com/svn/pcsxr@90008 e17a0e51-4ae3-4d35-97c3-1a29b211df97
Refactored plugin warnings.

git-svn-id: https://pcsxr.svn.codeplex.com/svn/pcsxr@90009 e17a0e51-4ae3-4d35-97c3-1a29b211df97