Cleanup of parameter naming in Helmholtz.h

Signed-off-by: Ian Bell <ian.h.bell@gmail.com>
Added function for setting of reference state that takes pointer to a fluid class

Signed-off-by: Ian Bell <ian.h.bell@gmail.com>
Added the pseudo-pure EOS for R407F and added a flag params.HSReferenceState to Fluid class to allow to set H,S reference state to a standard reference

Signed-off-by: Ian Bell <ian.h.bell@gmail.com>
Fixed build script for pseudo-pure and updated templates

Signed-off-by: Ian Bell <ian.h.bell@gmail.com>
Updated R407F.cpp

Signed-off-by: Ian Bell <ian.h.bell@gmail.com>