Merge branch 'beta' of https://gitlab1.ptb.de/Holger/pafiX into beta

input/input_example.dat

src/bc.f90

src/electrostatics.f90

src/fluid.f90

src/makefile

src/momentum.f90

src/parallel.f90

src/particlesTransport.f90

src/post.f90

src/pre.f90

src/pressure.f90

src/var.f90

src/writedat_fluid_xy.f90

src/writedat_fluid_xz.f90

src/writevtk_fluid_xy.f90

src/writevtk_fluid_xyz.f90

src/writevtk_fluid_xz.f90

src/writevtk_fluid_yz.f90