Update vendor dependencies

* backbone
* jquery
* underscore
* todomvc common js

examples/backbone/node_modules/jquery/dist/jquery.js

 /*!
- * jQuery JavaScript Library v2.1.3
+ * jQuery JavaScript Library v2.1.4
  * http://jquery.com/
  *
  * Includes Sizzle.js
@@ -9,7 +9,7 @@
  * Released under the MIT license
  * http://jquery.org/license
  *
- * Date: 2014-12-18T15:11Z
+ * Date: 2015-04-28T16:01Z
  */
 
 (function( global, factory ) {
@@ -67,7 +67,7 @@ var
 	// Use the correct document accordingly with window argument (sandbox)
 	document = window.document,
 
-	version = "2.1.3",
+	version = "2.1.4",
 
 	// Define a local copy of jQuery
 	jQuery = function( selector, context ) {
@@ -531,7 +531,12 @@ jQuery.each("Boolean Number String Function Array Date RegExp Object Error".spli
 });
 
 function isArraylike( obj ) {
-	var length = obj.length,
+
+	// Support: iOS 8.2 (not reproducible in simulator)
+	// `in` check used to prevent JIT error (gh-2145)
+	// hasOwn isn't used here due to false negatives
+	// regarding Nodelist length in IE
+	var length = "length" in obj && obj.length,
 		type = jQuery.type( obj );
 
 	if ( type === "function" || jQuery.isWindow( obj ) ) {

examples/backbone/node_modules/todomvc-common/base.js

@@ -114,7 +114,12 @@
 	})({});
 
 	if (location.hostname === 'todomvc.com') {
-		window._gaq = [['_setAccount','UA-31081062-1'],['_trackPageview']];(function(d,t){var g=d.createElement(t),s=d.getElementsByTagName(t)[0];g.src='//www.google-analytics.com/ga.js';s.parentNode.insertBefore(g,s)}(document,'script'));
+		(function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){
+		(i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),
+		m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)
+		})(window,document,'script','https://www.google-analytics.com/analytics.js','ga');
+		ga('create', 'UA-31081062-1', 'auto');
+		ga('send', 'pageview');
 	}
 	/* jshint ignore:end */
 
@@ -228,7 +233,7 @@
 			xhr.onload = function (e) {
 				var parsedResponse = JSON.parse(e.target.responseText);
 				if (parsedResponse instanceof Array) {
-					var count = parsedResponse.length
+					var count = parsedResponse.length;
 					if (count !== 0) {
 						issueLink.innerHTML = 'This app has ' + count + ' open issues';
 						document.getElementById('issue-count').style.display = 'inline';