added support for symfony/annotations-pack

symfony/annotations-pack/1.0/manifest.json

@@ -0,0 +1,3 @@
+{
+    "aliases": ["annotations", "annotation", "annot", "annots"]
+}

symfony/routing/3.3/etc/routing.yaml

@@ -2,7 +2,8 @@
 #    path: /
 #    defaults: { _controller: 'App\Controller\DefaultController::index' }
 
-# Depends on sensio/framework-extra-bundle:^3.0 and doctrine/annotations
+# Depends on sensio/framework-extra-bundle, doctrine/annotations, and doctrine/cache
+#   install with composer req sensio/framework-extra-bundle annot
 #controllers:
 #    resource: ../src/Controller/
 #    type: annotation