Introduction to R - 23 March 22

Introduction to R course taught with the University of Sheffield on 23/03/2022.

Primary client was NHS Scotland. We hope the materials were useful to them.

What's Changed

• correct error in solutions by @RobertASmith in #21
• Post course additions by @RobertASmith in #22
• session 6 on new branch by @RobertASmith in #23

Full Changelog: v.2.0.0...v2.0.1