Rebuilds v2 into v3
Major changes:
- Removes database support for storing ingredients
- Creates customized navbar and signout
- Moves views
  - Login/Signup moved to index
  - RecipeFinder holds ingredients and will display recipes
  - New view planned: clicking recipe does (GET to YUMMLY) and hits the response's URL to recipe source in separate window
  - New view planned: Favorited recipes
- Planned feature
  - Favoriting checkbox
  - Pictures id'ed by recipeId
  - Store recipeId in database
Current progress:
  - Needs to parse ingredientArray into api string to AJAX call to GET route to API (pass ingredientArray to controller and then to API Module for string conversion and API call)
Adds username to navbar, minor link name change for Favorites
Renames index_v2.rb to index.rb
Removes deprecated ingredients model
Adds template for recipe items
Minor tweaks to checkbox functionality and how username is retrieved
Imports controller from previous version (Cookbook routes)
Adds Recipe GET routes for API calls
Adds Favorite GET routes for viewing favorites
Renames Favorites link
Username is retrieved from sessions hash instead of controller route
Completes two Yummly API GET methods for recipe calls
Refactors event listeners into their own named function
Fixes bug that removes ingredient template when delete ingredients function is invoked
Completes AJAX calls to Yummly API
Adds default image for recpies without an image in database
Adds view for /favorites route
Adds recipe model and creates associations to user model
Adds a button in the recipe template to support adding to favorites
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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