Inpgen robustness, films:
1 Currently from my tests it seems that inpgen does not work with film calculations,
where atoms positions are specified in completely absolut coordinates and cartesian=T. The z-coordinate is not left like it is.
2 The bug (k-point mesh) from issue #39 (closed) seems still to be there in the film case.
(This case is a rather bad test case, if I find a better one I post it here.)