/// <summary>
		/// Used in Gloabal.asax to setup this CacheManager to handle paths where the RouteOptions.BasePath
		/// leading directory is used to distinguish the paths
		/// </summary>
		/// <param name="routes"></param>
		/// <param name="opts"></param>
		public static void RegisterDefault(RouteCollection routes, CachingOptions opts = null)
		{
			opts = opts ?? new CachingOptions();

			var path = string.Format("{0}/{{hash}}/{{type}}/{{*path}}", opts.BasePath);

			var mgr = new CacheManager(LoadAssets(opts.CacheFile), opts);

			routes.Insert(0, new Route(path, new CacheHandler(mgr)));

			Instance = mgr;
		}
		public CacheHandler(CacheManager combined)
		{
			Cache = combined;
		}