Alpha Release v0.6.3

[jngls]

A minor release to update based on new Rust features and switch license to MIT or APACHE 2.0.

What's Changed

• Switch out circleci rust orb for cimg docker container by @alexmadeathing in Switch out circleci rust orb for cimg docker container #69
• ilog is now stable, so we no longer need our own implementation by @alexmadeathing in ilog is now stable, so we no longer need our own implementation #70
• Update README.md by @alexmadeathing in Update README.md #71
• Prep v0.6.3 - Update licenses by @alexmadeathing in Prep v0.6.3 #72

Full Changelog: v0.6.2...v0.6.3

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This discussion was created from the release v0.6.3.