Some documentation for the project

1. Get started

• Usage instructions
• Multiple installations

2. Background

• History and why I created this, and use cases
• Limitations (there are a lot!)
• Comparisons with other package managers
• How this pip-installable distribution can help

See #11 for the above.

3. Sphinx (closed as not planned since I do not need versioning for this project and won't benefit from the additional maintenance required from hosted Markdown documentation)

• Hosted documentation
• Add extensions
• Versioning if necessary