Also apply the distance criterion when checking for BH mergers. Read the correct value of G from the physical constant structure.

Improve the hydro task splitting logic to take into account the star content of cells as well.

See merge request !851

Ignore inhibited particles in timestep

See merge request !856

Fixed typo in the hydro-only task splitting criterion. Need to consider both ci and cj's part counts.

Split the star formation task into two parts

See merge request !844

Simplify the construction of i/o properties and add the option to have an i/o conversion function returning an int for all the part types.

Lock before removing particles

See merge request !858

Re-check that a particle has not already been removed by a different thread in the locked section of the code when particles move out of their box.

Modified the default maximal Eddington fraction in all the EAGLE example to 150% to reflect the mistake from the original EAGLE runs where the fraction was set to 100% / h.

Version that correctly flags the BHs to swallow and removes them before dying in the time-step calculation function.

In the black hole interactions functions, added a loop over BH pairs that is only activated in the case of swallowing/merging.

Update the gpart mass when synchronizing when the star or BH mass changes.

Closes #592

See merge request !855