Merge branch 'master' into FOF

examples/main.c

src/active.h

src/black_holes/EAGLE/black_holes.h

src/cell.c

src/cell.h

src/cooling/EAGLE/cooling.c

src/engine.c

src/engine_maketasks.c

src/engine_marktasks.c

src/feedback/EAGLE/feedback.c

src/feedback/EAGLE/feedback.h

src/feedback/EAGLE/feedback_iact.h

src/feedback/EAGLE/feedback_properties.h

src/runner.c

src/scheduler.c

src/space.c

src/space.h

src/task.c

src/task.h

tools/plot_task_dependencies.py