Linfeng - First PR of c++ thermo using pybind11

[gitlinffff]

c++ functions I created at this stage:

• MoistAirGasConstant

• MoistAirSpecificHeatPressure

• WaterLatentHeatVaporization

• WaterLatentHeatSublimation

• RelativeHumidityFromDewPoint

• DryLapse

• DryLapseProfile

• CaldlnTdlnP

• MoistLapse

• MoistLapseProfile

• LCL

• _CheckPressure

• _SaturationVaporPressureLiquid

• _SaturationVaporPressureSolid

• SaturationVaporPressure

• DewPoint

• MixingRatio

• SaturationMixingRatio

• SpecificHumidityFromMixingRatio

• SpecificHumidityFromDewPoint

• VirtualTemperature

• lambert_wm1

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:white_check_mark: dopplershift
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