Create a unique constraint on project and nereid user #2244

Task ID: 2244
Merge pull request #37 from Abhisar/feature/task-2244

Create a unique constraint on project and nereid user #2244
Allow filtering by the tasks you are watching #2441
Merge pull request #39 from priyankarani/feature/task-2282

Activity stream for commit on task #2282
More XHR improvements
Migration to 2.8 #2089

Review ID: 303003