EZP-20238 - Updated Symfony dependencies
EZP-20238 - Updated Monolog bundle to 2.2.* + Added egulias/listeners-debug-command-bundle for debug
EZP-20238 - Removed _internal route (obsolete)
EZP-20238 - Activated router_proxy parameter for Framework bundle (seems to be mandatory when using ESIs)
EZP-20238 - Updated DemoBundle templates for ESI rendering

Using now "strategy: esi" instead of "standalone: true" and controler() function to point a controller identifier.
EZP-20238 - Comply to new format for routes (forward compatibility)
EZP-20238 - Updated dependencies