Require authentication for most controllers
Remove blog features
Only show "All Attendances" when signed in
Move the seating chart to its own controller

This will make room for the students index page.
Create a basic student index page
Merge branch 'assignment-7'

* assignment-7:
  Create a basic student index page
  Move the seating chart to its own controller
  Only show "All Attendances" when signed in
  Remove blog features
  Require authentication for most controllers