Add debug_panel
Add courseassgnment toggle functionality
Make the toggle button works
Remove useless form
Added debug_panel to travis requirements
Added assignment-id and stripped trailing spaces
Sent assignmentId to the view and removed commented code
Removed GET parameters in toggle_assignment_activity
as recommended by @IvayloBachvarov .
Also optimized SQL query and mapping.
Refactored and extended toggle_assignment_activity tests
Add toggle button
Add visualization in list view
Merge branch 'ca_labels_fixed'

Conflicts:
	courses/templates/show_course_students.html