Increased version number following the addition of star-formation and feedback jointly over MPI, black hole accretion and feedback (also over MPI), refactoring of the hydro parameters, improvement to the memory footprint and completion of first fully-fledged EAGLE runs.

Added loop over the FOF groups to create black holes. Still need to allocate space for the black holes.

Destroy the runners cleanly when shutting down the engine.

Closes #559

See merge request !819

add a new engine_step_prop_stop which makes the runners quit if set. engine_clean now sets the prop, releases the runners, and pthread_waits on them.

Added a run label to the parameter file that gets written to the snapshot headers.

See merge request !817

Add ANARCHY-DU and refactor `hydro_properties.c`

See merge request !810

General style improvement and documentation of the core FOF routines. Do not pass the 'space' structure into the routines to avoid indirections.

Fix cosmo gizmo

See merge request !814

Add init_parts

See merge request !812