daily_reports adding functional/first graph implemented on users/show

* set up api namespace for routing ajax requests
* created graph.js for all graph related calls and configuration
  * still need to incorporate styling theme for graph
* removed graph.js from asset pipeline (broke other tests)
* created users.html.haml to be used for user show page
  * included graph.js file with javascript tag
  * `Rails.application.config.assets.precompile += %w( graph.js )` in config/initializers/assets.rb
* completed preliminary testing on adding daily_reports
* included shoulda matchers for model associations
* api/users_controller needs refactoring and more data messaging for other charts and ranges