Fix #2679 (#2973)

* Fix redraw order

* Fix error when option is not defined

* Allow template labels

* Add .travis.yml file

* Add experiment travis code

* Fix react example

* Make selectiveExtend accept null/undefined parameters

lib/util.js

@@ -188,7 +188,7 @@ exports.selectiveExtend = function (props, a, b) {
 
     for (var p = 0; p < props.length; p++) {
       var prop = props[p];
-      if (other.hasOwnProperty(prop)) {
+      if (other && other.hasOwnProperty(prop)) {
         a[prop] = other[prop];
       }
     }