add config feature (for controlled event binding)

This lets the user choose which events are bound automatically by introducing a configuration mechanism. Useful if managing refreshes by other means (e.g. [jquery-resize](https://github.com/cowboy/jquery-resize)). It defaults to binding all the original event listeners.

Note: Perhaps the global config object is to be frowned upon by namespace purists, but I rathered not break the auto-start nature of the script, especially for regression purposes.