Using GoogleDoc syntax consistently

lbmpy/chapman_enskog/chapman_enskog_steady_state.py

lbmpy/maxwellian_equilibrium.py

lbmpy/methods/conservedquantitycomputation.py

lbmpy/methods/creationfunctions.py

lbmpy/methods/entropic.py

lbmpy/methods/momentbased.py

lbmpy/moments.py

lbmpy/phasefield/analytical.py

lbmpy/stencils.py