Do not use deprecated functions.

mockup/fieldtemplates.html

@@ -29,7 +29,7 @@
     </div>
     <div class="form-group">
         <div class="col-md-1">
-            <button type="button" onclick="QfqNS.addFields('#template', '#target', 10)">Add</button>
+            <button type="button" onclick="QfqNS.appendTemplate('#template', '#target', 10)">Add</button>
         </div>
     </div>
 </form>
@@ -54,7 +54,7 @@
         </div>
 
         <div class="form-group qfq-delete-button">
-            <button type="button" onclick="QfqNS.removeFields(this)">Remove</button>
+            <button type="button" onclick="QfqNS.removeThisChild(this)">Remove</button>
         </div>
     </div>
 </script>
@@ -75,7 +75,7 @@
     $(function () {
         $(".qfq-fields").each(
             function () {
-                QfqNS.initializeFields(this);
+                QfqNS.initializeTemplateTarget(this);
             }
         );
     });