Added handlebars library

  jQuery library uploaded in previous commit
Created Index template
Created stylesheet
Updated index view to include script tags and the following variables:

  * var buildItemHTML
  * var allItemsCallback
  * var newItemCallback
  * also converted lists into tables
Added default serializer options to todo application controller
Added placeholder to form in index view
Updated index view in todo spa to add new items to api
Created TodoItem js file
Removed Todo js file