Fix the docs

[bannanc]

I'm not sure what I did that possibly could have caused it, but something I changed in PR #24 broke the docs. I just clicked through the website and everything seems fine, but the badge says it is failing... I'll try rebuilding and report back I guess.

[bannanc]

I managed to do this, on the readthedocs page. However, it was in the keep trying things until it works way, instead of a systematic approach so I'm not 100% sure what fixed it, but I think the two most likely culprits were these:

I checked and unchecked the "Install your project inside a virtualenv using setup.py install" button multiple times and can't remember what the original setting was. However, when I first logged on there was a "requirements.txt" written in the requirements file section. I don't have a requirements.txt file, instead I have a .readthedocs.yml file in the top directory which uses conda to specify the python environment with environment.yml in the docs directory.