remove node_modules and .gitignore them

node_modules/es5-ext/object/flatten.js

@@ -1,16 +0,0 @@
-"use strict";
-
-var isPlainObject = require("./is-plain-object")
-  , forEach       = require("./for-each")
-  , process;
-
-process = function self(value, key) {
-	if (isPlainObject(value)) forEach(value, self, this);
-	else this[key] = value;
-};
-
-module.exports = function (obj) {
-	var flattened = {};
-	forEach(obj, process, flattened);
-	return flattened;
-};