Add Participated to DiscussionModel->GetWhere().
Add Participated to DiscussionModel->GetWhere().
Merge branch 'feature/user-participated' of github.com:vanilla/vanilla into feature/user-participated

* 'feature/user-participated' of github.com:vanilla/vanilla:
  Add Participated to DiscussionModel->GetWhere().

Conflicts:
	applications/vanilla/models/class.discussionmodel.php
Add Participated column to Discussion Model.
Add "Participated" class to discussions.
Add the participated column to guest discussion results.
Merge pull request #1952 from vanilla/feature/user-participated

Add "Participated" column to DiscussionModel->GetWhere()