code: function(url, version, config) {
  		if (!config.rewriteScheme) {
  			return url;
  		}
  
  		var basename = path.basename(url);
  		var ext = path.extname(url).substr(1);
  		var filename = basename.replace(new RegExp('\\.' + ext + '$'), '');
  
  		var data = {
  			url: url,
  			dirname: path.dirname(url),
  			basename: basename,
  			ext: ext,
  			filename: filename,
  			version: version
  		};
  
  		if (typeof config.rewriteScheme == 'string') {
  			return _.template(config.rewriteScheme, data);
  		}
  
  		return config.rewriteScheme(data);
  	}
docs: Creates versioned URL from original one
  @param  {String} url     Original URL
  @param  {String} version Cache-busting token
  @param  {Object} config
  @return {String}