Tetris: spin is reverses for T and L

[Porrumentzio]

Playing Tetris on version 0.15.0 I noticed that the spin works backwards for T and L pieces. I would well say that they are reversed, in comparison to previous versions.

[pserwylo]

Ah, good catch, thanks. I was tweaking the guts of how controllers work (so that we can soft-drop pieces and also hold down left and right instead of continual tapping), and accidentally flipped it.

I've tagged v0.15.1 to be built by F-Droid, so should be released within the week.