tiny revision on substrate solver
add multi properties for vertex belonging to several materials

- NEW : add the method for setting multi properties for a vertex
- CHG : change the method for getting physical property, adding material name parameter
- NEW : add related methods for multi properties in SctmPhys class
tiny but important change based on last commit

- CHG : change the order of finding elements when setting multiple property of vertex
Merge branch 'addMultiPropertyForVertex'