expertiza/expertiza — pull request #262 by mengcao (2013-03-15 03:13:49+00:00)
Title: CSC517 E608

Assignment: E608
Authors: Meng Cao, Kenny Yarboro, Hao Liu
Changes: course.rb, course_team.rb, course_node.rb, course_participant.rb, user.rb, ta.rb and related unit tests