"README.md" did not exist on "0b25e9c8d917a239857b688cbe01df45f533795a"
Fixed bug in HLLC Riemann solver flux calculation.
This fixes #216 (closed) (again, but now all cases).
I basically overlooked a tiny detail in the real GIZMO and changed the order of some operations that cannot be interchanged. Square test is now verified to work with all 3 possible Riemann solvers.
