...still buggy and very incomplete.

The new test does not pass yet but it might already work.

get wann_setup interface working for wannier 1.1/2 and 2.0 with wan90version input in the most brutal way by copying the wann_postproc_setup again and adjusting the interface

Note: The Wannier code is not yet connected to the main code

Based on v0.26 hybrid branch