Enhanced TBP fraction input: boiling point and (molar mass or desnity)

Currently, [addTBPfraction] requires both molar mass and density. Some users have boiling point data and only one other property (either density or molar mass), requiring manual calculations to obtain the missing parameter.

Proposed Solution
Add  methods for [addTBPfraction] that can calculate missing EOS parameters from two known properties one of which is boiling point