Reduced the show_menu methods on the game part as well.
Indentation and comment clean up.
Added copyright notice.
Small code format issue.
Keep the playlist menu open ofter a selection.
cleanup RELEASE_NOTES after announcing
Merge pull request #14 from nurupo/master

Added copyright notice
Show the ogg's title (metadata) in the playlist menu.
Adds another separator between the editor tool buttons.
Enable the warning for non core items.
Remove the option to disable the mdi feature of the editor.
Mark modified maps in the editor's "Window" menu.
Indentation fix.
Fix spelling in comments.
More spell fixing.
And another spell fix.
And another spell fix.
Spell fix.
Updated INSTALL and RELEASE_NOTES with the vorbisfile dependency.
Enable the "Save all maps" feature.