Enable complex bundle namespace to load routes

When we have a prefix before the shortnamespace eg MyCompagny\Backend\UserBundle we can't load the routes
Parsing the *Bundle.php file we find now the good namespace to load
Enable to load namespace_prefix with \
Fix route for scopes
Remove var_dump
Fix RoutingLoaderTest
Merge pull request #510 from cedriclombardot/fix-routing-loader

Enable complex bundle namespace to load routes
Enable to add a sidebar in show view

show:
  params:
    sidebar:
      'Widget Title':
          parial: AcmeDemoBundle:UserShow:_widget.html.twig
# or
          render: AcmeDemoBundle:Article:recentArticles
# or with params
          render:
            controller:  AcmeDemoBundle:Article:recentArticles
            params:
                max: 3