Fix memory leaks, fixed by @arjenw in PR #16

Author: Jelte Lagendijk

dist/TreeView.mpk

@@ -261,6 +261,9 @@ require([
             dojo.forEach(this.actions, function(action) {
                 action.free();
             });
+            dojo.forEach(this.records, function(record) {
+                record.free();
+            });
         },
 
         _setupEvents : function() {

src/TreeView/widget/GridView.js

@@ -145,7 +145,7 @@ define([
                 return;
             this._destroyed = true;
 
-            dojo.forEach(this.subs, function (sub) {
+            dojo.forEach(this._subs, function (sub) {
                 dojo.disconnect(sub);
             });