Merge branch 'nnrw56-FOF_hashmap-patch-87425' into FOF

.gitignore

examples/main_fof.c

src/Makefile.am

src/c_hashmap/hashmap.c

src/c_hashmap/hashmap.h

src/c_hashmap/main.c

src/engine.c

src/engine.h

src/fof.c

src/space.c

src/space.h

tests/Makefile.am

tests/testHashmap.c

tools/task_plots/plot_tasks.py