Added Feed controller, added students controller, added corresponding views and routes. Tests pending.

Files Modified.

modified:   app/assets/stylesheets/bootstrap_and_overrides.css.scss
modified:   app/controllers/application_controller.rb
modified:   app/controllers/feed_controller.rb
modified:   app/controllers/home_controller.rb
modified:   app/controllers/students_controller.rb
modified:   app/models/student.rb
modified:   app/views/feed/show.html.haml
new file:   app/views/students/new.html.haml
new file:   app/views/students/show.html.haml
modified:   config/routes.rb