Added a lot of documentation and comments to the code. Also, renamed a number of variables, files and functions. Changed the $\tau$ test points to exactly match those of DISORT (per `disotest.f90`) which significantly reduces the size of the repository. Fixed a few minor bugs.
**Full Changelog**: https://github.com/LDEO-CREW/Pythonic-DISORT/commits/v0.7.0