1.1.0

Added

• track forum views, topic and post updates and creations with xAPI events
• allow to search users by any of its meaningful fields in Django admin
• allow to archive a forum with the new can_archive_forum permission
• track topic views with XAPI events
• automatically assign a public_username to instructors and administrators
  when none is defined in the LTI authentication
• allow administrators and instructors to move topics to forums in the same