Merge branch 'Velociraptor_output_strategy' into 'master'

doc/RTD/source/ParameterFiles/index.rst

doc/RTD/source/VELOCIraptorInterface/stfwithswift.rst

examples/DwarfGalaxy/dwarf_galaxy.yml

examples/EAGLE_25/eagle_25.yml

examples/EAGLE_6/eagle_6.yml

examples/SmallCosmoVolume_DM/small_cosmo_volume_dm.yml

...ples/SmallCosmoVolume_VELOCIraptor/small_cosmo_volume.yml

examples/main.c

examples/parameter_example.yml

src/Makefile.am

src/common_io.c

src/common_io.h

src/engine.c

src/engine.h

src/io_properties.h

src/parallel_io.c

src/physical_constants.c

src/serial_io.c

src/single_io.c

src/space.h