Fix categories and nodes relationship
Remove failing cucumber tests

These tests should be reimplemented as the CSC517 projects are completed.
Add the rails4 branch to travis
Add tests for the student_task model
Fix the schema file for Travis
refactored self.data_adapter
Changing function names to be more consistent with convention
Refactor data_template function
Added Edit and Delete functionality on the topics tab to add and delete topics
Making bar and line graph work after refactoring chart
Got rid of male, female redundant data
Removed unnecessary axis info from pie chart
Made changes in pie_template
Refactored analytic helper and enabled pie charts
Modified code such that both instructor and student topic page renders the page in sign_up_sheet
Modified code such that both instructor and student topic page renders the page in sign_up_sheet
enabling instructor to edit a topic and using the same partial as the sign_up_sheet
Fix associating an assignment with a course from the assignment.
TODO comments updated
fixed bug for super admin