Document Python Methods w/ proper docstrings.

[CalderWhite]

We have decided to use Google-style docstrings for the python methods. More information on their standards here: http://google.github.io/styleguide/pyguide.html#38-comments-and-docstrings

[CalderWhite]

We have to remember that the RSI function can give poor results when too many threads are used on a small dataset. A note about this should be put in the docstring of RSI as a sort of "Buyer Beware".