Merge remote-tracking branch 'origin/master' into back_of_the_queue

configure.ac

doc/RTD/source/EquationOfState/index.rst

doc/RTD/source/ParameterFiles/parameter_description.rst

examples/GravityTests/DiscPatch/HydroStatic/plotSolution.py

examples/HydroTests/GreshoVortex_2D/plotSolution.py

examples/HydroTests/GreshoVortex_3D/plotSolution.py

examples/main.c

examples/main_fof.c

examples/parameter_example.yml

src/Makefile.am

src/black_holes/Default/black_holes_io.h

src/black_holes/EAGLE/black_holes_io.h

src/black_holes_struct.h

src/cell.c

src/cell.h

src/clocks.c

src/clocks.h

src/collectgroup.c

src/collectgroup.h

src/common_io.c