renames Student to CourseStudent and CourseSetting to CourseSettings
moves timestamping of database models into parent model
cleans up import of canvas_sdk items
Merge pull request #35 from penzance/feature/auto_timestamp

moves timestamping of database models into parent model
Merge pull request #36 from penzance/feature/canvas_cleanup

cleans up import of canvas_sdk items
Merge pull request #32 from penzance/feature/student_rename

Models Rename