Skeleton for initial review and testing on readthedocs and discussion with project leadership. Missing several key sections of text, indicated by TODO directives.
0.7.0
The v0.7.0 release of vrs-python supports VRS v1.2.0 as described in the [VRS preprint](https://www.biorxiv.org/content/10.1101/2021.01.15.426843v1).