Fixed annoying error on third page of any question
Implemented parsing LTI parameters and storing them to session + navigating to chosen question
Added netbeans config to gitignore
Stub for sending grade back + mocking authentication
Passing assignment id instead of question id
Mocking required session variables (auth and request.assignment)
Accumulating grade
Forming LTI grade response XML (straigtforward, using sprintf)
Stubbed response send and grade cleanup
Fixed error on page 3
Implemented sending grades to LMS
Removed noop try-catch block
Merge pull request #2 from open-craft/eugeny/grading-support

Added LTI provider functionality