v0.2.3

Added extended GCD, using a variation of Lehmer's GCD algorithm for Naturals and Integers.

v0.2.2

Clean up documentation and cross-references.

v0.2.1

Fix KaTeX in malachite-base rustdocs. Normally this would be too minor for a separate release, but I want to get this change to the public rustdocs.

v0.2.0

Full Changelog: https://github.com/mhogrefe/malachite/commits/v0.2.0

The initial public release of Malachite. Naturals, Integers, and Rationals are ready to use.