Added note about security config in documentation.
minor #272 Added note about security config in documentation. (Koc)

This PR was merged into the 3.0.x-dev branch.

Discussion
----------

Added note about security config in documentation.

Commits
-------

544a7e7 Added note about security config in documentation.
Re-implementation of https://github.com/sensiolabs/SensioFrameworkExtraBundle/pull/253
Template Annotations are now overriden by route parameters
Fix coding style typo