Bug event stream dashboard


### References
* https://www.pivotaltracker.com/story/show/81723108

### Notes
* Problem was due to the editor task being updated and the event stream firing off a task update message down the Paper channel.  It did not have a context of a user, so it sent down lite_papers with an empty array of roles.  This caused the roles to be dropped for the lite_paper causing it to disappear from the dashboard.

### Changes
* The actual bug fix is a stop-gap solution until event_stream messages understand the context of a current_user.
* Update the console messages for event stream so that it displays exactly what subscription fired (example:  "paper_role:created").  This will help in future debugging.

![tahi 2014-11-03 11-22-04 2014-11-03 11-22-13](https://cloud.githubusercontent.com/assets/5796310/4885568/92eb7ef8-6375-11e4-86fd-1722d1cf93d0.jpg)
Unused block argument - `subscription_name`. If it's necessary, use `_` or `_subscription_name` as an argument name to indicate that it won't be used.