deleting .gitmodules old leftover
fixes empty variables used in output messages

there where variable names left over after the code refactoring
they have now correct names or are filled, messages stay the same
fixes #138
correct tomb_key variable usage in logs
Merge branch 'master' into fix_147
Add _plot function to set * consistently.
Run exec_safe_post_hooks as , not
Clarify intent and self-document post-hooks
Fix check_shm for the case when the OS does not create the directory.
Normalize variable names