function inner( data )
	{
		that.configure( data, on_scene_loaded );
		if(on_complete)
			on_complete(data);
	}
Loads a config file for the player, it could also load an scene if the config specifies one
@method loadConfig
@param {String} url url to the JSON file containing the config
@param {Function} on_complete callback trigged when the config is loaded
@param {Function} on_scene_loaded callback trigged when the scene and the resources are loaded (in case the config contains a scene to load)