Made some more stuff mpi-parallizable
Removed assertion that breaks in parallel runs
Fix msfem solution for parallel runs
Load balance the right grid for parallel runs
Removed false assertions (not correct in parallel runs)
Cleanup, added sanity check
Better timing output in parallel runs
Get rid of yet another make_father
Fixed oversampling for parallel runs
Reenable header check (sorry, dunno why I deactivated it)