add all frontend files

node_modules/es-abstract/2016/floor.js

@@ -0,0 +1,11 @@
+'use strict';
+
+// var modulo = require('./modulo');
+var $floor = require('math-intrinsics/floor');
+
+// http://262.ecma-international.org/5.1/#sec-5.2
+
+module.exports = function floor(x) {
+	// return x - modulo(x, 1);
+	return $floor(x);
+};