We have a winner!

1) I added logic to display a simple popup window to declare a winner
after whichever player places the last checker off the game board. A new
layout was added to correspond with the change.
2) I also moved the computer play logic of the gameboard into a single
function to keep changes uniform (originally it was in two places).
3) Computer play now requires the user to touch the screen after the
computer has finished moving in order to have their dice rolled. This
changes allows the user to see the computer dice rolls (even though the
move is not seen) before continuing play.
4) I also changed the hollow highlight back to green for places the
player can move. It was difficult to see the off board selection with
white. I also find it funny the game highlights a location on the board
for removing pieces from the board.