Issue #1989230 by ParisLiakos, alexpott: Update to Symfony 2.3.

composer.json

composer.lock

core/vendor/autoload.php

core/vendor/composer/ClassLoader.php

core/vendor/composer/autoload_classmap.php

core/vendor/composer/autoload_namespaces.php

core/vendor/composer/autoload_real.php

core/vendor/composer/installed.json

core/vendor/kriswallsmith/assetic/CHANGELOG-1.1.md

core/vendor/kriswallsmith/assetic/Gemfile

core/vendor/kriswallsmith/assetic/README.md

core/vendor/kriswallsmith/assetic/composer.json

core/vendor/kriswallsmith/assetic/package.json

...iswallsmith/assetic/src/Assetic/Asset/AssetCollection.php

...dor/kriswallsmith/assetic/src/Assetic/Asset/FileAsset.php

...dor/kriswallsmith/assetic/src/Assetic/Asset/GlobAsset.php

...dor/kriswallsmith/assetic/src/Assetic/Asset/HttpAsset.php

...vendor/kriswallsmith/assetic/src/Assetic/AssetManager.php

.../vendor/kriswallsmith/assetic/src/Assetic/AssetWriter.php

...h/assetic/src/Assetic/Extension/Twig/AsseticExtension.php