v2.0.0

Supports the new gpt-3.5-turbo (chat-based) models which are, cheaper and, according to Greg Brockman, better. Also supports storing ata.toml in a default configuration directory.

What's Changed

• Specify authors and license in Cargo.toml by @rikhuijzer and @ctrlcctrlv in #22
• Support gpt-3.5-turbo by @rikhuijzer and @ctrlcctrlv in #23

Full Changelog: v1.0.3...v2.0.0