Merge branch 'dev' of https://github.com/kitygraph/kityminder into dev

src/core/node.js

@@ -189,7 +189,9 @@ var MinderNode = KityMinder.MinderNode = kity.createClass( "MinderNode", {
     },
     clone:function(){
         function cloneNode(parent,isClonedNode){
-            var _tmp = new KM.MinderNode(isClonedNode.getData());
+            var _tmp = new KM.MinderNode();
+
+            _tmp.data = utils.clonePlainObject(isClonedNode.getData());
             _tmp.parent = parent;
             if(parent){
                 parent.children.push(_tmp);

src/core/utils.js

@@ -117,7 +117,7 @@ var utils = Utils = KityMinder.Utils = {
                 tmp = source[i];
                 if (utils.isObject(tmp) || utils.isArray(tmp)) {
                     target[i] = utils.isArray(tmp) ? [] : {};
-                    utils.clone(source[i], target[i])
+                    utils.clonePlainObject(source[i], target[i])
                 } else {
                     target[i] = tmp;
                 }