Merge branch 'master' into darwin/gear_mechanical_feedback

configure.ac

doc/RTD/source/FriendsOfFriends/stand_alone_fof.rst

doc/RTD/source/ParameterFiles/output_selection.rst

doc/RTD/source/Planetary/equations_of_state.rst

doc/RTD/source/SubgridModels/GEAR/chemistry.rst

doc/RTD/source/SubgridModels/GEAR/feedback.rst

doc/RTD/source/SubgridModels/GEAR/gear_model.rst

doc/RTD/source/SubgridModels/GEAR/index.rst

doc/RTD/source/SubgridModels/GEAR/output.rst

doc/RTD/source/SubgridModels/GEAR/sinks/index.rst

doc/RTD/source/SubgridModels/GEAR/sinks/output.rst

doc/RTD/source/SubgridModels/GEAR/sinks/theory.rst

doc/RTD/source/SubgridModels/GEAR/supernova_feedback.rst

doc/RTD/source/SubgridModels/index.rst

examples/Planetary/EoSTables/get_eos_tables.sh

...ltz_IdealGas_LargeDensityContrast_3D/kelvin_helmholtz.yml

examples/SantaBarbara/SantaBarbara-256/getIC.sh

examples/SantaBarbara/SantaBarbara-256/santa_barbara.yml

examples/parameter_example.yml

src/Makefile.am