The he*Thermo classes have been renamed to match their corresponding
basic thermo classes. E.g., rhoThermo now corresponds to RhoThermo,
rather than heRhoThermo.
Now that the reaction system, chemistry and combustion models are completely
separate from the multicomponent mixture thermophysical properties package that
supports them it is inconsistent that thermo is named reactionThermo and the
name multicomponentThermo better describes the purpose and functionality.
