Get rid of reverse dependency for security,

remove single jquery usage in security in favor of native dom element
creation

notebook/static/base/js/namespace.js

@@ -4,6 +4,7 @@
 var IPython = IPython || {};
 define(function(){
     var utils = require('base/js/utils');
+    IPython.security = require('base/js/security');
     IPython.utils = utils;
     IPython.load_extensions = utils.load_extensions;
 

notebook/static/base/js/security.js

@@ -2,10 +2,8 @@
 // Distributed under the terms of the Modified BSD License.
 
 define([
-    'base/js/namespace',
-    'jquery',
     'components/google-caja/html-css-sanitizer-minified',
-], function(IPython, $) {
+], function(sanitize) {
     "use strict";
     
     var noop = function (x) { return x; };
@@ -59,7 +57,7 @@ define([
          * sanitize just the css in style tags in a block of html
          * called by sanitize_html, if allow_css is true
          */
-        var h = $("<div/>").append(html);
+        var h = document.createElement('div').append(html);
         var style_tags = h.find("style");
         if (!style_tags.length) {
             // no style tags to sanitize
@@ -123,7 +121,5 @@ define([
         sanitize_html: sanitize_html
     };
 
-    IPython.security = security;
-
     return security;
 });