rev087/ng-inspector — pull request #41 by ThomasWeiser (2014-07-23 10:10:42+00:00)
Title: Take care of supernumerous $destroy events

See issue #30

Should avoid errors like:
```
TypeError: Cannot read property 'removeChild' of null
at TreeViewItem.destroy (chrome-extension://aadgmnobpdmgmigaicncghmmoeflnamj/ng-inspector.js:494:27)
at chrome-extension://aadgmnobpdmgmigaicncghmmoeflnamj/ng-inspector.js:1190:11
at Scope.$broadcast (http://localhost/OutlinerModel/lib/angular/angular.js:13082:28)
at Scope.$destroy (http://localhost/OutlinerModel/lib/angular/angular.js:12734:14)
...
```