Added the getDiagonal method to MultiArray class. Started on check diagonal method on Board class
Remove the getDiagonal method because the results were not adecuate. Added the reverseDiagonal method
fixed ReverseDiagonal, it was over reversing the diagonal. Added Diagonal and anti Diagonal methods. Both tested.
Optimize a bit the diagonal methods, created the check_diagonal method on board class
added the heck_anti_diagonal method, and is working fine