readme update

readme update

Added generalized Chandrashekar real-gas flux

Prep implementation generalized Chandrashekar KEEP flux

restructured temperature solve functions

improved VLE method using helmholtz lower envelope

added maxwell construction (under development)

delete test.py

added Van der Waals equations of state

moved generic math operations to computational.py

fixed entropy variables

made thermodynamics consistent with Chan and fixed initial condition error

translate to euler, added thermodynamics

copy of SPADES repo

Initial commit