merge reviews

Gemfile

app/assets/stylesheets/application/ratingstars.scss

app/controllers/collections_controller.rb

app/controllers/learning_objects_controller.rb

app/controllers/reviews_controller.rb

app/models/collection.rb

app/models/concerns/followable.rb

app/models/concerns/reviewable.rb

app/models/concerns/sociable.rb

app/models/rate.rb

app/models/review.rb

app/models/review_rating.rb

app/views/collections/show.html.erb

app/views/learning_objects/show.html.erb

app/views/reviews/_list.html.erb

app/views/reviews/_rating.html.erb

app/views/reviews/_review.html.erb

app/views/reviews/index.html.erb

app/views/reviews/new.html.erb

app/views/reviews/show.html.erb