EZP-20238 - Updating Symfony dependency
EZP-20238 - LocationAwareStore is now based on Symfony\Component\HttpKernel\HttpCache\Store
EZP-20238 - Replaced usage of Symfony\Component\HttpKernel\Log\LoggerInterface (deprecated) in favor of PSR-3
EZP-20238 - Ensure to match a siteaccess only for a master request
EZP-20238 - Removed custom Twig chain loader
EZP-20238 - Comply to new format for routes (forward compatibility)
EZP-20238 - Comply to deprecation of using a filename with Yaml::parse()
EZP-20238 - Use normalizeKeys( false ) in config tree to avoid key normalization whenever needed
Merge branch 'symfony2.2'

Conflicts:
	eZ/Bundle/EzPublishCoreBundle/DependencyInjection/Compiler/TwigTweaksPass.php
	eZ/Publish/Core/MVC/Legacy/View/Provider.php