Add isMember to the discussion and content profile
Add tests for 'isMember' in content and discussion profiles
Merge origin/master and fix conflicts
Follow up on review
Refactored how isMember in content/discussion is retrieved
Added an annotations module

This module exposes functionality that allows you to annotate files.
The basic CRUD REST endpoints are exposed that allow you to create,
edit, delete and list annotations.

Annotations have been hooked up to activities and will generate the
appropriate notifications and emails.