Added standard InChi key & string for DiethylEther
Added standard InChi key & string for DiethylEther

Values obtained from: https://pubchem.ncbi.nlm.nih.gov/compound/3283#section=Names-and-Identifiers
CoolProp/CoolProp,henningjp/CoolProp,CoolProp/CoolProp,CoolProp/CoolProp,henningjp/CoolProp,CoolProp/CoolProp,CoolProp/CoolProp,henningjp/CoolProp,henningjp/CoolProp,CoolProp/CoolProp,henningjp/CoolProp,CoolProp/CoolProp,henningjp/CoolProp,CoolProp/CoolProp,henningjp/CoolProp,henningjp/CoolProp