...it is used with the command line option -last_extra.

Added a special config for IFF again and removed the find_package(HDF5) from cmake as this fails for newer cmake versions

...this is only a dirty quick fix. :)

First attempt to implement a MPI interface to ChASE. Compiles but is untested, hence does not work yet...

+ let it generate the correct triangle of the matrix.

+ add some debug output in hybrid branch

...to make the mysterious segmentation error in the allocation of the
former facfac array magically disappear. Now it is a stack array. I did
not identify the cause for the error.