Initial commit
Implemented app-wide dummy Mailer service, following Symfony book
Moved Mailer service configuration to bundle and importing it to app/config/config.yml
Added NewsletterManager class, according to symfony book
Fixed use declartion for NewsLetterManger in DefaultController.php
Moved services calls to AcmeStoreBundle:Default:services controller
Added Acme\StoreBundle\Helpers->firstNameToUpperCase() service