When custom responses are edited, display the previously saved rating value.
Merge branch 'production' of github.com:expertiza/expertiza into production

Conflicts:
	app/helpers/response_helper.rb
Allow TAs to impersonate Students that are participating in the same class that
the TA is assisting in.
Always return an array from `AssignmentParticipant#get_participants`
even if it is an empty array
Increase the sessions store to 4MB
The first name of a User with a fullname format of 'last, first mi' or 'first
last' retrieves the correct first name.
Fix Issue #372 - method called on nil in MenuItemsController
Fixed bug that prevented reviewing topics during their
submission period, regardless of whether instructor
wanted to allow review during that period.
Merge branch 'production' of github.com:expertiza/expertiza into production
Integrated E711
Integrated E711
Integrated E711
Integrated E711
Integrated E711
Merge branch 'production'

Conflicts:
	app/controllers/application_controller.rb
	app/controllers/assessment360_controller.rb
	app/controllers/assignment_controller.rb
	app/controllers/grades_controller.rb
	app/controllers/menu_items_controller.rb
	app/controllers/participants_controller.rb
	app/helpers/response_helper.rb
	app/models/assignment.rb
	app/models/response.rb
	app/models/response_map.rb
	app/models/user.rb
	app/views/grades/_participant.html.erb
	app/views/grades/_review_table.html.erb
	app/views/student_review/list.html.erb
	app/views/submitted_content/_submitted_files.html.erb
	db/schema.rb