Add option to write each VR output to a separate directory

See merge request !934

This reverts commit 28265917, reversing
changes made to 856bcb95.

Add metallicity & sfr unit to vr configs

See merge request !989

Only check the correctness of hydro time-steps in cell_check_timesteps() if there are hydro particles in the cell.

Cosmological integration

Closes #405

See merge request !979

In the case of a zoom simulation, use only the high-resolution DM particles to…

See merge request !985

Better calculation of the time-steps of each cells at rebuild time.

See merge request !964

Black holes mpi swallow

See merge request !986

Mark particles that have been hit by feedback (SNII or AGN) with a flag that is later stored in the snapshots.

When black holes merge, accumulate the swallowed angular momentum from the small one onto the larger one.

Updated the theory document to include the changes to the accuracy of the cosmological time integration.

Adds matplotlib stylesheet and cleans up a few scripts

See merge request !982

Correctly initialise everything in the non-cosmological case. Also extend the range that is probed in testCosmology.c

Un-dither the position of the cells in the cell meta-data to make them match the…

Closes #629

See merge request !977