implemented the phase_field model of Abas Fakhari

lbmpy/phasefield_allen_cahn/__init__.py

lbmpy/phasefield_allen_cahn/analytical.py

lbmpy/phasefield_allen_cahn/force_model.py

lbmpy/phasefield_allen_cahn/kernel_equations.py

lbmpy/phasefield_allen_cahn/parameter_calculation.py

...s/phasefield_allen_cahn/test_phase_field_allen_cahn.ipynb