Fix
* Add the ability to exclude google and optionally additional glob patterns from import rewrites ([`beadb73`](https://github.com/cpcloud/protoletariat/commit/beadb73227c03fc592f37f4bb7bd30b63188397c))
Documentation
* Add docstring to _should_ignore ([`52225ad`](https://github.com/cpcloud/protoletariat/commit/52225ad2bcac4f7634cc86fe9e525da900a2d6b9))