fixes wall placing bug
removes unused code from quoridor activity
displays warning when placing invalid wall
begins implement jump over
implements canJumpOver and jumpToSquare methods in Session class
player can now jump over adjacent piece in Quoridor Activity
changes the adjacency set of a board square to only front, back, left and right (without diagonally adjacent squares)
implements canMoveDiagonally method in Session
allows player to move diagonally
implements diagonal movement in Quoridor Activity
adds Graph class
implements Dikstra's algorithm
adds pathfinder class, player can no longer place wall that will block off opponent completely