Docs: Deploy with Documenter.jl

[Andy Nowacki]

It would be ideal if the documentation could be autogenerated by e.g. Documenter.jl and hosted somewhere, linked to in the repo’s README file. This is not very hard to set up (though admittedly, I don’t know about Bitbucket), and can save a lot of effort in updating the docs when set up because docstrings and the results of code examples are automatically inserted.

[Charlotte Haley]

I’m still not entirely satisfied with the contents of the docs themselves, but the implementation using Documenter.jl works reasonably as of this commit.

[Charlotte Haley]

This commit completes the documentation to date.