Releasing v0.2.1

What's Changed

• Use a fixture to generate the tray by @ianhi in #7
• working version of read_rockmaker() by @dennisbrookner in #9
• Add preliminary documentation for read_rockmaker() by @dennisbrookner in #12

New Contributors

• @ianhi made their first contribution in #7

Full Changelog: v0.2.0...v0.2.1