Renamed Teacher.testpapers -> Teacher.worksheets throughout
Removed sub-menu structure from per-quiz menu
The same view should open for report cards irrespective of ..

.. whether the link in the contextual menu or the top-level navigation
dropdown was clicked

NOTE: Any two links - in different hierarchies - that behave the same
way must have the same ID (ouch !)
Optimized query method - graded?
Two new query methods - gradeable? and grading_finished? - added ..

Methods called on objects
Renamed grading_finished? -> publishable? + added a new query method - has_scans?
Send mail when feedback for last response submitted

Same code as when we used to calibrate
Re-org'ed shared/ folder

There are now sub-folders that should have small .js.coffee files
with functionality common to 2 or more roles

For example, ad-ex has JS common to admin and examiner; tc-st has
JS common to teachers and students and so on ..
Deleted as part of shared/ re-organization
Centralized query to get applicable worksheets for a given role
Should have been part of the last commit
Changed names of tabs used by the teacher to see report-cards
 removed redundant files