building out lessons controller
started rating testing, lessons controller index view shows list of lessons, ratings has a controller
further additions to lesson CRUD.  displays lists of lessons, with linked instructor.
is active check box in new lesson, now default checked
Merge pull request #12 from n2diving/lessons

Lessons controller / view/ CRUD build out.  Allows is_active to be set, as well as attached instructor.  The model relationships may need some attention for attached students.  I'm a little fuzzy on that right now.  I would like for it to show a list of students in the room (also useful so I can do data averaging, student counts, etc... )