Only call engine_rebuild() and not engine_init_particles() in main_fof. We don't need the full thing.

Remove the option of a dry run. Print the number of BHs read in on startup. Do not print the number of seeds to create in the fof_dump_data() function.

Fof

See merge request !543

Changed the way we set the run frequency to use a physical simulation time rather than a fixed number of steps.

Better --fof help string and prevent the code from running with black holes seeding if the black holes policy has not been chosen.

EAGLE star formation: Change the over density criteria

See merge request !825

Added more units meta-data to the snapshots.

See merge request !821

Move the activation of FOF tasks to a separate function. Make a separate function call for the splitting of FOF tasks. Do not reset the unlocks or weights of tasks in engine_make_fof_tasks(); they are not used for FOF tasks and mess up the rest of the tasks.

Fixed out of source builds broken in hydro_parameters

Closes #586

See merge request !822