Renames files:
  app/helpers/sessions.rb => app/helpers/session_helper.rb
  app/views/cookbook.erb => app/views/recipe_finder.erb
  public/js/application.js => public/js/recipe_finder.js
Renamed from app/views/cookbook.erb
Adds routes for favoriting recipes
Creates recipes model and migrations
Creates view for favorites
Removes application.js from layout.erb (renamed to recipe_finder.js and moved to recipe_finder.erb)
Fixes naming of method called in POST '/favorites' route
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Creates helper methods for controller logic
Renamed from cookbook.js