Compiled Arithmetic.hs, BinSearchTrees.hs, and ListOps.hs

Compiled modules that aren't likely to be modified in the near term
Deleted capslocker and helloworld

Deleted IO demos
Updated BinTrees.hs

Added necessary functionality for the tree game
Compiled BinTrees.hs
Created TreeGameBackend.hs and persistentTreeGame.hs

Moved functionality from persistentTreeGame to TreeGameBackend module,
added functionality to get the game to actually work
Compiled TreeGameBackend.hs
Updated TreeGame.txt

I played the game.