Added transpose function and a state whether the vec is transposed. One can query the current state via is_col_vec.
Added test case for that.

Signed-off-by: Marius <UsYer@gmx.de>
Added functions like diag, transpose, sum, and norm.
Also added some test cases for norm. Is currently work in progress.

Signed-off-by: Marius <UsYer@gmx.de>