cleaned up dependencies for the TwigExtension, added
cmf_next_linkable/cmf_prev_linkable
Merge pull request #25 from symfony-cmf/twig_extension

cleaned up dependencies for the TwigExtension, added cmf_next_link/cmf_prev_link
added PublishWorkflowListener (see https://github.com/symfony-cmf/RoutingExtraBundle/pull/58)
Merge pull request #23 from symfony-cmf/publish_workflow_listener

added PublishWorkflowListener
add cmf_children_linkable