Refine the phase envelopes in the liquid side based on difference in pressure
Refine the phase envelopes in the liquid side based on difference in pressure

Closes #998

dcprojects/CoolProp,dcprojects/CoolProp,CoolProp/CoolProp,DANA-Laboratory/CoolProp,henningjp/CoolProp,henningjp/CoolProp,JonWel/CoolProp,CoolProp/CoolProp,henningjp/CoolProp,DANA-Laboratory/CoolProp,JonWel/CoolProp,henningjp/CoolProp,CoolProp/CoolProp,henningjp/CoolProp,JonWel/CoolProp,DANA-Laboratory/CoolProp,dcprojects/CoolProp,CoolProp/CoolProp,DANA-Laboratory/CoolProp,dcprojects/CoolProp,JonWel/CoolProp,JonWel/CoolProp,DANA-Laboratory/CoolProp,henningjp/CoolProp,dcprojects/CoolProp,CoolProp/CoolProp,JonWel/CoolProp,dcprojects/CoolProp,CoolProp/CoolProp,henningjp/CoolProp,CoolProp/CoolProp,JonWel/CoolProp,CoolProp/CoolProp,DANA-Laboratory/CoolProp,dcprojects/CoolProp,henningjp/CoolProp,DANA-Laboratory/CoolProp