WIP: student profile graph page;  fixed spacing in metrics controller
fixed bugs in metrics controller
fixed spacing
changed migrations to reflect other members' changes, schema to have pods have_many studen_assignments, pods no longer have_many students
added new student_profile view, and added new student_profile action
WIP:student_grade_array in metrics controller
added class average series to student graph page
WIP: class average method by assignment for students view
fixed merge conflicts in course model
Merge pull request #31 from zrivest/student_graph_pages

Student graph pages