Sat p is working very very well.  Better than REFPROP at low pressure

Signed-off-by: Ian bell <ian.h.bell@gmail.com>
Minor formatting and getting files prepared for DLL

Signed-off-by: Ian bell <ian.h.bell@gmail.com>
Merge branch 'v5' of https://github.com/coolprop/coolprop into v5

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