modify db schema/model/controller by assignment table
modify deliverable model associate with assignment
remove course from model deliverable
assignment creation[bug before validation]
act as list for assignments, ajax in destroy assignment
Revert "Prevent users from logging effort for other courses"

This reverts commit 126e25d4b09b63042c095971acb8ce8b1f267d7f.
fix and make all test cases passed!
Merge branch 'master' of http://github.com/lydian/cmusv
redone assignment creation test cases positive
view scores: initial version
set up GradeBook model

1. associate GradeBook with Course, User, Assignment
2. add test data for gradebooks
3. show student names, grades on index page
rename controller from gradebooks to grade_books

1. reanme controller, helper class
2. rename view folder
3. rename route resources
Improved test case for requests, Faculty view only limitation
add seeds.rb
modify db/seeds.rb to add testing data. able to see course name, assignment name on gradebook index view, find the correct course
Merge branch 'view_scores_v2'
pass all test cases
remove file
remove file
assignments good view