added except for matrix	new file:   engleb-3a/engleb-3a/d_except.h
added matrix	new file:   engleb-3a/engleb-3a/d_matrix.h
made dictionary take in a string	modified:   engleb-3a/engleb-3a/dictionary.h
added skeleton		modified:   engleb-3a/engleb-3a/grid.h