Linalg 2 qr

updating qr calls 
Now qr most strongly fit matlab call syntax and also allows to get direct lapack results if needed
qr tests are split between complex/real inputs and no mre contain DISPLAY
that is a way to be sure all cases are treted and to defer some to others. Perhaps there are better ways but this ensure same way for every new lapack factorization.
If you do not see any speed problem I will prefer not to to have to rewrite the 6 following pull request to come