Tahi-project/tahi — pull request #697 by neo-tahi (2014-12-08 22:05:31+00:00)
Title: Ihat callbacks

### References:
* https://www.pivotaltracker.com/story/show/83452714

### Heads up
* remove `IHatJob` model
* no longer make a subsequent request back to iHat to get converted file (just request it directly)

### DO NOT MERGE until iHat changes are pushed out