added param for switch to fast CP, alg2 is fast_cube_pruning, alg3 is fast_cube_pruning_2
added param for switch to fast CP, alg2 is fast_cube_pruning, alg3 is fast_cube_pruning_2

agesmundo/cdec,agesmundo/cdec,agesmundo/cdec,agesmundo/cdec,agesmundo/cdec