The local NewtonRaphson is moved from MaterialLib/SolidModels to NumLib in order for further reusing.
This class provides a basic NewtonRaphson routine to handle the nonlinear constitutive relationships existing in the local problem. After being moved to NumLib , it can be reused by other processes, e.g the two-phase multicomponent process which I am working on now.
(p.s. Some of the changes are caused by running clang-format)