Added two buttons. A new game button and an undo button. The new game button works fine, but the undo button I'm having some difficulty coming up with a good idea on how to implement it.
Revert "Added two buttons. A new game button and an undo button. The new game button works fine, but the undo button I'm having some difficulty coming up with a good idea on how to implement it."

This reverts commit 49447b2ba6c6949592eaf0dee0aa2cd40357b7ab.
Added an undo button and a start new game button. The undo button doesn't work, and I'm having some difficulty thinking up a solid resolution to the problem.
Merge remote-tracking branch 'origin/chessApp'