text: var wrapper = require('gulp-wrapper');
  module.exports = function wrapperRunner(stream, opts, task) {
  	var obj = {};
  	if(opts.header) obj.header = opts.header;
  	if(opts.footer) obj.footer = opts.footer;
  	return (obj.header || obj.footer) ? stream.pipe( wrapper(obj) ) : stream;
  }