Add file config and routing change

cần bỏ cả routing của  AcmeDemoBundle ở app/config/routing_dev.yml nữa
 16 # AcmeDemoBundle routes (to be removed)                                          
 17 _acme_demo:                                                                      
 18     resource: "@AcmeDemoBundle/Resources/config/routing.yml"                     
~