Merge branch 'master' into removed_variable_shadowing

configure.ac

examples/SedovBlast_3D/sedov.yml

src/debug.c

src/debug.h

src/engine.c

src/hydro.h

src/hydro/DebugInteractions/hydro.h

src/hydro/DebugInteractions/hydro_debug.h

src/hydro/DebugInteractions/hydro_iact.h

src/hydro/DebugInteractions/hydro_io.h

src/hydro/DebugInteractions/hydro_part.h

src/hydro/Default/hydro_iact.h

src/hydro/Gadget2/hydro_iact.h

src/hydro/Gizmo/hydro_iact.h

src/hydro/Minimal/hydro_iact.h

src/hydro/PressureEntropy/hydro_iact.h

src/hydro/Shadowswift/hydro_iact.h

src/hydro_io.h

src/part.h

src/runner.c