Clean up docstrings

Convert many class and function references into actual hyperlinks. Clean up
prose and remove several spurious lines of whitespace.
Make class `ModelFactory` more specific

Ensure that the 'name' field generated by this factory is no longer than 255
characters. Create a new method to facilitate this change. Add unit tests for
both of the string generation methods.
Add unit tests for path `api/v2/organizations`

Add some simple tests which exercise the ability to GET and POST to that URL.
Merge pull request #947 from Ichimonji10/tests

Tests