...the indices of the special k points are still missing.

don't store the output density anymore. I now read it from the
last input density. ...this may be slightly inconsistent but
in the case of self convergence it should be irrelevant.

...otherwise the variable ispin is not defined.

This is going to be extended with functionality for the output of augmented
band structure data.

...It actually only is a test commit for my current development environment. :)

Merge libxc branch as GGA seems to be approximately working...

See merge request fleur/fleur!9

Removed dublicates of some routines with different case in filename. Caused problems in last Release.