Merge branch 'master' into parallel_rebuild2

Makefile.am

configure.ac

doc/RTD/source/ExternalPotentials/index.rst

doc/RTD/source/ParameterFiles/index.rst

doc/RTD/source/VELOCIraptorInterface/output.rst

doc/RTD/source/index.rst

examples/ExternalPointMass/externalPointMass.yml

examples/Hernquist_circularorbit/hernquistcirc.yml

examples/Hernquist_circularorbit/makeIC.py

examples/Hernquist_circularorbit/plotprog.py

examples/Hernquist_circularorbit/run.sh

examples/Hernquist_radialinfall/README

examples/Hernquist_radialinfall/hernquist.yml

examples/Hernquist_radialinfall/makeIC.py

examples/Hernquist_radialinfall/plotprog.py

examples/Hernquist_radialinfall/run.sh

examples/IsothermalPotential/energy_plot.py

examples/IsothermalPotential/isothermal.yml

examples/KelvinHelmholtz_2D/makeMovie.py

examples/Makefile.am