Simple csv downloader

[jnelson16]

Add the ability for a basic user of Python to quickly download a csv of the data, with only the most basic columns (similar to the output from the GUI).

[jnelson16]

Alternatively, simply implement #7.

[jnelson16]

Mostly closed by #11, but we may want to add a simplifying function to reduce the number of columns in the output.