Finishing module 6, need to fix an issue before I pass off and move on to module 7

ENORMOUS LIST OF CHANGES:
-Chessboard now has 'canKingEscape' method for some reason, I may delete it soon
-Location finally has a 'toString' method
-GameManager has a bunch of new code to detect checkmate for both sides, get all friendly/opposing pieces, get a king's location, and get a piece's available moves
-Player has a default constructor that has no use, which I may delete soon
-Pieces now have a Location and a constructor to set that Location
-FileParser updated to support placing pieces on the board with the new Piece constructor
-Two text files added to test checkmate, checkmateTest and checkmateWithFriendly