groupon/urbanairship — pull request #57 by blueminder (2014-10-23 19:16:11+00:00)
Title: fix tags_for_device (/api/device_tokens/:device_token/tags route no longer used)

`tags_for device` currently returns a blank hash.
Investigating myself, the `/api/device_tokens/:device_token/tags` route returns a 404 when I cURL it myself.
This version grabs the tags from the device_info method and returns it in the same hash format as before.