confine all status possibilities to the result of a method call, status_options in Appointment.rb
Availability.on_day and #today scope, TodaysAvailability utilizes
availability model has validations first, relationships second just to be consistent with other models, no functional changes
updates to allow Appointment status to have No Show - Student and Instructor versions
availability cannot be edited if it has upcoming appointments
TODO reminder in rails_admin initializer about bulk status update of appointments
application.html.haml renders shared/footer, says powered by tamatojuice
TODO reminder about instagram
TODO reminder about removing availabilities - currently implemented via rails_admin
appointments_controller and appointments resources in routes
basic appointments controller #index which feeds all appointments ordered by start time
site nav bar includes Book Now, link to appointments path
basic appointments view folder with index