remind101/request_id — pull request #4 by ejholmes (2013-09-12 16:53:46+00:00)
Title: Add a public interface for storing and retrieving the request_id.

I'd rather than be using Thread.current[:request_id] directly. This hides that behind a public interface.

```ruby
RequestId.request_id
# => "2297456c027c536d0eb3eb86583fe5a9"
```