AssetHolder can directly accept Asset objects on create()
Asset::addDependency and addDependencies defined & half tested
Changing file references to asset. Adding assetHolder as parameter
assetUrl moved to assetsUrl
Asset now is able to print a currentUrl based on currentPath
Fileloader uses assets instead of files
Comments for cachestore fixed, too
CacheStore now caches dependencies, as it would
introduced cssminifier