Removed grade files, fixed tables, added score values to form elements
Editing grade value display
Merge pull request #813 from UM-USElab/11-05-14-table-alignment

11 05 14 table alignment
Fixed display of timeline on gsi and instructor dashboards
Fixed display of assignments to be graded on assignment show page
Fixed min score display in student dashboard
Fixing calculations for mean and max scores
Merge pull request #814 from UM-USElab/11-06-14-fixes

11 06 14 fixes
Fixing group submission view
Merge pull request #815 from UM-USElab/11-07-14-group-submissions

Fixing group submission view
Refactored mass_update to improve response time, moved caching scores to a background worker and refactored mass_edit to use eager loading (fixed 1+N problem that was hidden in the edit view) and significally improved response time
Added a Hash helper method to find a nested key values
Switched student_id to student
Lazy created grades for no grades students and auditors
Refactored remaining grading methods and integrated the grade update worker
Merge branch 'staging' into grades_worker