Avoid jQuery conflicts

see http://learn.jquery.com/using-jquery-core/avoid-conflicts-other-libraries/

Not sure what's the best way to achieve this – django uses:

```
(function($) {
})(django.jQuery);
```

Start with the linked jQuery guidance and inspect how django-admin2 loads or exposes jQuery; the issue does not name a file, test, or entry point. Compare the integration with Django's django.jQuery example and define done as admin2 working without conflicts alongside another library using the $ global.

Written by the indexing model from the issue text.