Adding raw diff feature file
Adding a raw link and .diff format for a code review

* Added 'raw' link to code review
* Added custom diff mime-type
* Added new format for show action
Ensuring raw doesn't wrap on small screens
Changing '.expiry' to '.info'
Implemented cucumber steps for raw diff link
Merge pull request #1 from jakspalding/raw-diffs

Adding link to download raw diff file
Refactor to use unified for diff parsing
Update unified version
Add statsd-ruby gem
Add StatsD wrapper
Add statsd config variables
Add default statsd config
Update Stats class with count method
Send basic statistics tracking to statsd
Track parse timing
Added download patch link and format which downloads a .patch of the diff
Added cucumber tests and changed downloaded file to use token and not object_id
Revert "Added cucumber tests and changed downloaded file to use token and not object_id"

This reverts commit 18a70b2c4ce3a9eef39f3af2197c0d046ea5eec9.
Revert "Revert "Added cucumber tests and changed downloaded file to use token and not object_id""

This reverts commit 4270d3c06c47bead2015221256b09999854739b8.
Reverting some changes, merging patch download into viewing raw link for merge
Merge pull request #3 from Leyths/dev

I got a headache looking through the commits... I trust you.