add assetFactory and assetManager from admin-bundle
split service files, clean twig extensions
add twig file to autoload config
use abstract extension
add parameters for assetic compiler pass
split asset manager to asset loader and asset storage
add btn_csrf_path function
add asset manager extension
move Exception to request method
add methods to AssetLoaderInterface
change add method
rename asset extension, add get_asset_src function
auto register bundle functionality (not ready)