Added line to dump page html casperjs

IPython/html/tests/casperjs/util.js

@@ -13,6 +13,9 b' casper.get_notebook_server = function () {'
 casper.open_new_notebook = function () {
     var baseUrl = this.get_notebook_server();
     this.start(baseUrl);
+    this.then(function () {
+        console.log(this.getHTML());
+    });
     this.thenClick('button#new_notebook');
     this.waitForPopup('');