Merge remote-tracking branch 'edx/master' into opaque-keys

Conflicts:
	cms/djangoapps/contentstore/tests/test_contentstore.py
	cms/djangoapps/contentstore/views/component.py
	cms/djangoapps/contentstore/views/item.py
	cms/djangoapps/contentstore/views/preview.py
	cms/djangoapps/contentstore/views/tests/test_container.py
	cms/static/js/spec/views/unit_spec.js
	cms/static/js/utils/module.js
	cms/templates/container.html
	cms/templates/studio_vertical_wrapper.html
	cms/templates/studio_xblock_wrapper.html
	common/djangoapps/student/views.py
	lms/templates/notes.html
	lms/templates/textannotation.html
	lms/templates/videoannotation.html

cms/static/js/utils/module.js

@@ -7,12 +7,17 @@
  * getUpdateUrl: a utility method that returns the xblock update URL, appending
  *               the location if passed in.
  */
-define([], function () {
+define(["underscore"], function (_) {
     var urlRoot = '/xblock';
 
     var getUpdateUrl = function (locator) {
+<<<<<<< HEAD
         if (locator === undefined) {
             return urlRoot + "/";
+=======
+        if (_.isUndefined(locator)) {
+            return urlRoot;
+>>>>>>> edx/master
         }
         else {
             return urlRoot + "/" + locator;