tobie/specref — pull request #148 by tobie (2014-10-22 17:04:49+00:00)
Title: Adds id and versionOf attributes; Create an new HTTP API for looking up specs with a URL

These changes are bundled together as the `id` and `versionOf` attributes are necessary for the reverse lookup feature.

Would like to get a couple of eyes on this @darobin, @marcoscaceres, etc.