speeded up writing HSX file format
Instead of using the old MPI communication we now use the block-communication scheme which greatly reduces number of messages (and it seems to be much much faster).
The file-format also changed a bit. Instead of storing no_s, it now stores nsc for clarity.
This is a WIP since I would like to adjust HSX format a final time (also contain Ef
). This would make the file-format complete and easily extendable.
Edited by Nick R. Papior