minor tweak to align code more with the ContentBundle
reuse the CoreBundle ContentController
updated to match changes in the RoutingExtraBundle as well as all other
dependencies

warning: composer.lock needs to be updated before merging

see https://github.com/symfony-cmf/RoutingExtraBundle/pull/57 and https://github.com/symfony-cmf/Routing/pull/46
Merge pull request #153 from symfony-cmf/rename_alias_to_type

updated to match changes in the RoutingExtraBundle as well as all other dependencies
Rss block example
enable block caching