Added standard InChi key & string for R152A
Added standard InChi key & string for R152A

Values obtained from: https://pubchem.ncbi.nlm.nih.gov/compound/6368#section=Names-and-Identifiers
CoolProp/CoolProp,CoolProp/CoolProp,CoolProp/CoolProp,CoolProp/CoolProp,henningjp/CoolProp,henningjp/CoolProp,henningjp/CoolProp,CoolProp/CoolProp,henningjp/CoolProp,CoolProp/CoolProp,henningjp/CoolProp,henningjp/CoolProp,CoolProp/CoolProp,henningjp/CoolProp,CoolProp/CoolProp,henningjp/CoolProp