Implement Sphinx Documentation

[andewmark]

Update the ReadMe to tell users how to use Mission Blue API

We can use Spinx to generate a documentation website for Mission Blue similar to Click

[Lementknight]

Before we release the first version of the Mission Blue API, I want to make sure that we are implementing robust documentation for it.

[Lementknight]

Here are the following Templates:
https://sphinx-themes.org/#themes

[Lementknight]

@andewmark, this link has all of the Python packages that use Sphinx for their documentation:
https://www.sphinx-doc.org/en/master/examples.html