#1295 Different implementations for A[i,j] and A[i].
This allows for example A[-1] to refer to the last element in the last column.
#1295 #176 Got A(I) and A(I,J) working as expected in MATLAB for I, J vectors
#1295 #176 Got A(I)=B and A(I,J)=B working as expected in MATLAB for I, J vectors
#176 Added ':' to Slice typemap
#1295 Refactor Matrix::getSub