ajaxorg/cloud9 — pull request #2204 by sergi (2012-09-19 13:37:18+00:00)
Title: Revisions working with collab

This PR enables revisions to work properly with Collaboration, taking advantage of the latest patch in Concorde, which determines whether the current user is `master` or not through Concorde's `isMaster` method.

The user being Master means that he is the only collaborator that can save changes in the document. Since auto-save will save ANY change every 2 seconds, this is safe for collaboration.

This patch also re-enables contributors in a revisions. Every change will now contain what contributors were involved in it.