Merge remote-tracking branch 'origin/master' into mpi-redistribute

.gitignore

configure.ac

examples/DiscPatch/HydroStatic/plot.py

examples/HydrostaticHalo/density_profile.py

examples/HydrostaticHalo/internal_energy_profile.py

examples/HydrostaticHalo/run.sh

examples/HydrostaticHalo/test_energy_conservation.py

examples/HydrostaticHalo/velocity_profile.py

examples/analyse_tasks.py

examples/analyse_tasks_MPI.py

examples/parameter_example.yml

examples/plot_tasks.py

examples/plot_tasks_MPI.py

examples/process_plot_tasks

examples/process_plot_tasks_MPI

src/Makefile.am

src/cell.c

src/const.h

src/drift.h

src/engine.c