Two point vectors in 2-D and 3-D #98
Description
We need a new data class for two point vectors in 2-D and 3-D that can be used for computing the split form of the divergence for nonlinear fluxes. When implementing this class, develop technical documentation that explains the mathematical formulation of the two point flux vector and the relationship to the flux divergence calculation in a conservation law. Relate the mathematical notation to the data layout and develop a few test cases that can be used to verify correctness of the implementation in SELF.