Fixes reading test that was missing argument

See merge request !909

Redshift IC Check

See merge request !908

Adds documentation for the SPH section of the parameter file

See merge request !907

Support for multiple softening lengths in the gravity solver

Closes #599

See merge request !884

Need to make sure that AX_CC_MAXOPT doesn't assume we have set CFLAGS and it should not extend them (ac_test_CFLAGS=yes)

Changed units and fixed eta

See merge request !906

Merged in new upstream version of the maxopt autotools macros that fixes the…

See merge request !905

Merged in new upstream version of the maxopt autotools macros that fixes the problem or erasing the CFLAGS.

Optionally read the StellarFormationTime in EAGLE. When the 'Stars:birth_time' parameter is not set to -1, overwrite the birth times read from the ICs.

Also update the smoothed metallicities when overwriting the values in chemistry_spart_first_init() for EAGLE.

When making a task 'none' in scheduler_split, make both t->ci and t->cj NULL to help with the debugging.

 - Trying to access c->logger or c->kick2 when not at the super level
 - Trying to access c->super for a task that is of type 'none'

Format

See merge request !902

Logger move task

See merge request !887

Simplify the calls to potential_derivatives_compute_M2P() and potential_derivatives_compute_M2L() since the inverse softening length is no longer needed.