Filled in Cell class basics (fields and getters/setters). Basic CellTests pass. Added empty constructor to Piece for mocking purposes.
Committing general changes to other files in case they are important. Also actually committing Piece (I forgot to include it in the last commit)
Changed created the enumeration Cell.Terrain and changed Cell.terrain from a Boolean to a Cell.Terrain.
Added Game and GameTest classes with empty methods.
Merged the Nick and Master branches, just to see how it works.