Additions
- Allow underscores in integers ([135](https://github.com/ron-rs/ron/pull/135))
- Added extension documentation ([130](https://github.com/ron-rs/ron/pull/130))
Changes
- Move sublime text syntax to separate repo ([138](https://github.com/ron-rs/ron/pull/138))
- Update `base64` crate dependency to 0.10 ([137](https://github.com/ron-rs/ron/pull/137))