Handle RowMajor

[alecjacobson]

I somehow found it very difficult to extract whether a matrix is row or column major within lldb. Right now it's extracting it from the type string and seems to work well.

Fixes #11

[tehrengruber]

Thanks for the addition, just a small suggestion.

[tehrengruber]

Suggested change

	def _row_element(valobj, row, rows, cols, is_row_major):
	if is_row_major:
	for i in range(row*cols, (row+1)*cols):
	yield valobj.GetChildAtIndex(i, lldb.eNoDynamicValues, True).GetValue()
	else:
	for i in range(row, rows*cols, rows):
	yield valobj.GetChildAtIndex(i, lldb.eNoDynamicValues, True).GetValue()
	def _row_element(valobj, row, rows, cols, is_row_major):
	if is_row_major:
	raw_idx_iterator = range(row*cols, (row+1)*cols)
	else
	raw_idx_iterator = range(row, rows*cols, rows)
	for i in raw_idx_iterator:
	yield valobj.GetChildAtIndex(i, lldb.eNoDynamicValues, True).GetValue()