tonycoco/pusherable — pull request #4 by jdurand (2014-05-20 02:06:18+00:00)
Title: Added the possibility to use a callable pusherable channel

Useful if you want to base a channel name on a group or user id... or whatever :
```
class Model < ActiveRecord::Base
pusherable -> { "private-account-channel-#{current_account.id}" }
end
```