Rename title accessors in Song.

Add a preference to prefer transliterations. Press F9 in the music
select screen to toggle it ("what's that kanji again?"); appearance
options entry forthcoming.

Hopefully fix wheel sections; we were assuming that sections were
always sorted the same as the songs in them, but this isn't true
with "OTHER".

stepmania/src/ScreenGameplay.cpp

@@ -1129,7 +1129,7 @@ void ShowSavePrompt( ScreenMessage SM_SendWhenDone )
 			"Would you like to save these changes back\n"
 			"to the song file?\n"
 			"Choosing NO will discard your changes.",
-			GAMESTATE->m_pCurSong->GetFullTitle().GetString() );
+			GAMESTATE->m_pCurSong->GetFullDisplayTitle().GetString() );
 		break;
 	case PLAY_MODE_NONSTOP:
 	case PLAY_MODE_ONI: