added the parsing of the axis instance fixed error with Ts and Ph wrappers giving empty figures added drawIsoLines wrapper
added the parsing of the axis instance
fixed error with Ts and Ph wrappers giving empty figures
added drawIsoLines wrapper

CoolProp/CoolProp-museum,CoolProp/CoolProp-museum,ibell/coolprop,ibell/coolprop,CoolProp/CoolProp-museum,CoolProp/CoolProp-museum,ibell/coolprop,CoolProp/CoolProp-museum,ibell/coolprop,ibell/coolprop,ibell/coolprop,ibell/coolprop,CoolProp/CoolProp-museum,ibell/coolprop,CoolProp/CoolProp-museum