Added task to send out email for each processed GradingRecord.
If send_mail evaluates to True in the POST data for updateProjectsForSurveyGroup task then the results of every GradingRecord will be mailed to the Student. The Mentor and Org Admins will be cc'ed.
Coverage: code coverage testing for Python
Coverage.py is a Python module that measures code coverage during test execution.
It uses the code analysis tools and tracing hooks provided in the Python standard
library to determine which lines are executable, and which have been executed.
For more information, see http://nedbatchelder.com/code/modules/coverage.html