Add per-grid-point capability

[charleskawczynski]

Need to add per grid point capability to port with CLIMA

1) Per grid point of spectrally resolved optical depth

Structs

• [x] AtmosphericState
• [x] InterpolationCoefficients
• [x] OneStream/TwoStream
• [x] SourceFuncLW
• [ ] SourceFuncSW (not actually tested)

Methods

• [x] interpolation
• [x] compute_gas_tau
• [x] compute_τ_absorption
• [x] source

2) Swap integration order

• [ ] Find integration over wavelength, and implement method to operate on optical depth, rather than fluxes

[sriharshakandala]

@charleskawczynski , @dennisYatunin , This issue may no longer be relevant. I would like to close this unless there are additional comments!