Initial gutting begun (STABLE)
Generalized grass layer to handle any small sprite
Added new mainSection to game play layer
Letters now scroll along new main game screen section
Cleaned up code, added comments, renamed things
Letter generation moved from GamePlayLayer to MainGameSection
Added LetterAdditionDelegate (and removed notifications), cleaned up LRMainGameSection code
Moved letter deletion to a delegate as well
Added rearrangement to delegate methods
Enabled background layer, moved functions