LTris 1.2.8 Released

This release fixes a bug in multiplayer where receiving and simultaneously clearing lines caused "bad empty lines". Also, another bug, that caused pieces at very high speed to tunnel through other pieces, has been fixed. And finally, an option has been added to adjust CPU speed for multiplayer which makes it quite more challenging and fun to play against the CPU. Of course, the algorithm itself could need some tweaking, but it's a start.