Use single quotes and project_dir parameter

Author: yceruto

app/config/config.yml

@@ -13,7 +13,7 @@ framework:
     #translator: { fallbacks: ['%locale%'] }
     secret: '%secret%'
     router:
-        resource: '%kernel.root_dir%/config/routing.yml'
+        resource: '%kernel.project_dir%/app/config/routing.yml'
         strict_requirements: ~
     form: ~
     csrf_protection: ~
@@ -26,7 +26,7 @@ framework:
     session:
         # http://symfony.com/doc/current/reference/configuration/framework.html#handler-id
         handler_id:  session.handler.native_file
-        save_path:   "%kernel.root_dir%/../var/sessions/%kernel.environment%"
+        save_path:   '%kernel.project_dir%/var/sessions/%kernel.environment%'
     fragments: ~
     http_method_override: true
     assets: ~

app/config/config_dev.yml

@@ -3,7 +3,7 @@ imports:
 
 framework:
     router:
-        resource: '%kernel.root_dir%/config/routing_dev.yml'
+        resource: '%kernel.project_dir%/app/config/routing_dev.yml'
         strict_requirements: true
     profiler: { only_exceptions: false }