Merge branch 'beta'

documentation/doxygen_codeGuide/codeGuide

documentation/doxygen_codeGuide/pafiXlogo.png

documentation/userGuide/pafiX_userGuide.pdf

input/input_example.dat

monitor.plt

run.sh

src/bc.f90

src/electrostatics.f90

src/fluid.f90

src/main.f90

src/makefile

src/momentum.f90

src/parallel.f90

src/particles.f90

src/particlesTransport.f90

src/post.f90

src/pre.f90

src/pressure.f90

src/restart.f90

src/var.f90