Created static creator functions for square and hexagonal 2D lattice

Core/PythonAPI/src/InterferenceFunction2DLattice.pypp.cpp

Core/Samples/inc/InterferenceFunction2DLattice.h

Core/Samples/src/InterferenceFunction2DLattice.cpp

Core/Samples/src/InterferenceFunction2DParaCrystal.cpp

Examples/Demos/simul_demo_lattice1.py

Examples/Demos/simul_demo_lattice2.py

...ulation/ex005_LatticeWithDisorder/LatticeWithDisorder1.py

...ulation/ex005_LatticeWithDisorder/LatticeWithDisorder2.py

...ulation/ex005_LatticeWithDisorder/LatticeWithDisorder3.py

...ulation/ex005_LatticeWithDisorder/LatticeWithDisorder4.py