AJ-2259 users role transferred to course membership
migration in schema
removed duplicate role definition
update controller calls to user roles to include course
adding scopes to users, courses, and course_membership
return proper ActiveRecord_Relation_User from user role scopes
added joins for user scope
update team model to call user with course
move current_user_is... to application helper to use in views
change wording
standardized is_professor? and refactored is role methods on user
added team leaderships table, model, and associations
team rake task to transfer leadership
account for role as method and column during migration
completed teams rake tasks
deprecate team_leader methods, adapt to leaderships.first for now
Updated sample roles
updating views to list all leaders
Merge pull request #782 from UM-USElab/roles

Roles