Add flag to turn template caching on/off (default to off)

cms/static/js/base.js

@@ -16,6 +16,10 @@ $(document).ready(function() {
     // scopes (namely the course-info tab)
     window.$modalCover = $modalCover;
     
+    // Control whether template caching in local memory occurs (see template_loader.js). Caching screws up development but may
+    // be a good optimization in production (it works fairly well)
+    window.cachetemplates = false;
+
     $body.append($modalCover);
     $newComponentItem = $('.new-component-item');
     $newComponentTypePicker = $('.new-component');

cms/static/js/template_loader.js

@@ -35,7 +35,8 @@
       
       localStorageAvailable: function() {
        try {
-          return 'localStorage' in window && window['localStorage'] !== null;
+    	   // window.cachetemplates is global set in base.js to turn caching on/off
+          return window.cachetemplates && 'localStorage' in window && window['localStorage'] !== null;
         } catch (e) {
           return false;
         }