Compile the gravity code as a separate convenience library. Use special compilation flags for this library. When compiling on AVX512, add extra flags to compile the gravity files.

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)

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

Added a new particle type for DM boundary particle in zooms. Created a new flavour of gravity: multiple-sotening.

Prevent users from compiling the EAGLE BH model without the gravity scheme that computes potentials.

Polls for a file .dump and when found dumps the active tasks and memory (if configured)