Re-add in admin page access
Support for approving/rejecting existing audits

Currently we have pending audits, which represent changes that have not
yet been applied. Now we also have the concept of "reviewing" an audit
that has already been applied.

If the review is 'accepted' then a ref is attached to the audit with
"ReviewAccepted" and nothing else happens.

If the review is 'rejected' then a ref is attached to the audit with
"ReviewRejected" and the change is rolled back.
Provide link to raw images
Don't json-encode payload for GET requests
Add photo review page
Merge pull request #421 from ahinz/topic/photo-review

Topic/photo review