muzich/vendor/symfony/assetic-bundle/Symfony/Bundle/AsseticBundle/UPGRADE.md

Changes in version 2.1

• Friendlier exception message when using Assetic in a bundle that Assetic has not been configured to scan
• Assets are no longer dumped to the filesystem when cache:warmup is run. This can only be done using the assetic:dump command
• Added support for GSS filter
• Assetic's routes are now automatically added when use_controller is true