- stop reason changed back to `length` from `max_tokens`
- Fixed the chatloop example
- Added `Clone` and `Debug` to all public types (if possible, `Error` couldn't because ureq & surf don't implement Clone for their `Error` types)
- Fix README to match the current library and not use `.unwrap`
Several cleanups:
- Flesh out the README
- Make the interface a little easier to use
- Add some examples
- Add some (sparse) documentation for public components
- Mark the `FinishReason` and `Engine` enums as non-exhaustive so new members can be added in the future without breaking backwards compatibility
