Getting rid of video tutorials
Merge remote-tracking branch 'heroku/master'
[Bug]: Call to scroll.overlayJson needed extra arguments
Alphabetically sort sektion list - other than sort by klass
Buttressed logic for abacus.next.{student | scan }
Added button to flip image in grading console ..

On button click, a request is sent to flip the current scan.
The request is queued => examiner comes back later to grade it
 New calibration (17,23,34)
Buttresssed code to handle case when student has only a first name
 Silly syntax error
new calibration
Text of some yardsticks revised to be simpler and more precise
 New yardstick for honest errors
New calibrations for honest errors

Old yardstick #23 -> #23 + #41
Support for adding comments onto scans added ..

Could be buggy at this point .. Expect bug-fixes
 Commented out alert statement
[Bug]: Changed the relative order of :code and :text to comply with web-service request
Special processing for comments ...

A shot in the dark really. Special characters can make your life specially hard
 trying to remove the single quotes
Visually distinguishing #add-comment btn when it is clicked
Limit comment-box to 20 characters long

Force brevity on the grader