Implement Revision content and children to stream. Crash and uuid.
Adding SessionContext class.
Add session_id to url when needed.
Add Context#filter_actions

To make session resource read only.
Add UserSession resource. should work now.
Fix context stub to implement filter_actions and bump version
Merge pull request #216 from maxigit/65454838_expose_revisions_in_the_api

65454838 expose revisions in the api