First production release.

Snippets in PyMOL command language for 18 text editors.

pymolsnips

This release has the snippets that underwent peer review. It is the release of record to coincide with the publication of record https://onlinelibrary.wiley.com/doi/10.1002/pro.3997 as of 2020 November 30. This release includes a reorganized README.md with most of the instructional content moved to index.html.