First attempt.
NaNs produced at d90 (line 70) for large wavelengths.
Calculate rho90 and tao90 from formulas.
Modified R.N and T.N expressions
Used x,y simplification for transmittance/reflectance. Next commit will ditch them.
Got spectra that look like Shawn's, but are offset. Next commit will be with traditional (Allen) definitions for initial reflectance/transmittance and x/y - based definitions of rho90 and tao90.
Changed reflectance/transmittance of elementary layer to original Allen definition (infinite geometric series sum).
Same plots as with original rho and tao definitions.
It works! Spectra perfectly match the ones produced by Shawn, despite differences in a,b definitions.

Now need to update to PROSPECT 5 and 5B.
Included PROSPECT 4, 5, and 5B.
Labeled PROSPECT file. Initialized empty inversion script.
Merge branch 'master' of https://github.com/blowfish711/prospect_bayes
Initialized GitHub repository for project.