Merge remote-tracking branch 'origin/master' into cells-per-task

.gitignore

configure.ac

examples/EAGLE_12/eagle_12.yml

examples/EAGLE_6/eagle_6.yml

examples/PerturbedBox_2D/perturbedPlane.yml

examples/PerturbedBox_3D/perturbedBox.yml

examples/main.c

src/Makefile.am

src/align.h

src/cache.h

src/debug.c

src/debug.h

src/dimension.h

src/engine.c

src/gravity.c

src/gravity.h

src/gravity_cache.h

src/hydro/Gadget2/hydro_iact.h

src/hydro/PressureEntropy/hydro.h

src/hydro/PressureEntropy/hydro_iact.h