various bugfixes/updates

unlock system now supports clear and failed extra stages
songs unlocked by roulette are no longer unlocked by selecting them as extra stage
'fixed' survived time for extra stage when failing

stepmania/src/MusicWheel.cpp

@@ -1174,7 +1174,8 @@ bool MusicWheel::Select()	// return true if this selection ends the screen
 		StartRandom();
 		return false;
 	case TYPE_SONG:
-		GAMESTATE->m_pUnlockingSys->RouletteUnlock( m_CurWheelItemData[m_iSelection]->m_pSong );
+		if (PREFSMAN->m_bUseUnlockSystem)
+			GAMESTATE->m_pUnlockingSys->RouletteUnlock( m_CurWheelItemData[m_iSelection]->m_pSong );
 		// fall-through - we want to check for unlocking only if its a song
 	case TYPE_COURSE:
 		return true;