Began model testing for:
  - Concerts
  - Venues
  - Concert_songs
deleted home route from routes.rb - no longer in use
Added concert show page
  - Branch named model/validations
  - Showing artist, venue, YT videos, and setlist
  - Still working on CSS and getting Twitter Bootstrap to work
  - Button functionality still needs to be added to add concert to a user
    page
Merge branch 'Onaracs-task/model_validations'