Revert "Modify det_manip to access determinant x_values and y_values"

This reverts commit d8e79056bffc13598ca63305610c5edd2182c21f.

After all, these functions are not useful...
[arrays] Add frobenius_norm to the lib.

-TODO : add the test !
-from cthyb project.
- change the name of the file
Add macro TRIQS_WRAP_ARG_AS_DICT for python parameter wrap

- Rename the attribute((annotate(...))
  because i) it is clearer ii) it leads to a warning on gcc.
Merge branch '1.2-dev' of github.com:TRIQS/triqs into 1.2-dev