[FA]{test before code} I32 - Map Manager useCell

#32
MapManager method to "use" a tile (essentially swaps a tile to some
other and back again on the next use of the method).
[FA]{test after code} I32 - useCell

#32
-useCell in MapManager implemented
[FA]{issue} I32 - door

Closes #32
-Changed maps to have 1 door per map
-Added door sound effect
-Changed useCell() of MapManager to move the door box2d body based on
the cell rotation