#33 rtd documentation

[josh-silvas]

Solves for #33 to produce RTD documentation on the diffsync library using the README files as a documentation source for details and examples, and using sphinx-apidoc for API reference doc generation.

I haven't created the RTD diffsync site on the github project just yet, but I can do that after we get everything lined out here. There is example documentation here https://diffsync-test.readthedocs.io/en/33-rtd-documentation/index.html

[glennmatthews]

This is a great start, thank you!

[glennmatthews]

Minor rendering error here as well - note that the last two paragraphs are indented as if they're part of the bulleted list:

[dgarros]

I'm gonna merge this one, publish it and we'll fix rendering issue has we find them