j-mcnally/capistrano-slack — pull request #18 by cthomaspdx (2014-05-22 20:33:00+00:00)
Title: Allow for custom notifications and messages. 

did a bit of a refactor to allow for custom slack messages. Updated docs. Should be backwards compatible with the previous releases. We use an older version of Capistrano so I removed the capistrano version from the gem spec. The only thing that might need to change is moving the require capistrano-slack to the shared.rb file, if you decide to make custom notifications. I hope you like it.