Merge branch 'master' into gravity_speedup

.gitignore

configure.ac

src/align.h

src/cache.h

src/dimension.h

src/engine.c

src/hydro/Gadget2/hydro_iact.h

src/kernel_hydro.h

src/parser.c

src/runner_doiact.h

src/runner_doiact_vec.c

src/scheduler.h

src/tools.c

src/vector.h

tests/Makefile.am

tests/benchmarkInteractions.c

tests/test125cells.c

tests/test27cells.c

tests/test27cells.sh.in

tests/test27cellsPerturbed.sh.in