Modified makeMove and unMakeMove to change enPassantSquare
Added enPassantSquare, changed identification of Pawn
Version 0.0.12.2 Update
Modified MakeMoveTest to test for enPassantSquare implementation

fixes #113
Version History - Version 0.0.12.2 Update
ReadMe Update for App Version 0.0.12.2
Version 0.0.12.2