function _fnCompatCols(init) {
		_fnCompatMap(init, 'orderable', 'bSortable');
		_fnCompatMap(init, 'orderData', 'aDataSort');
		_fnCompatMap(init, 'orderSequence', 'asSorting');
		_fnCompatMap(init, 'orderDataType', 'sortDataType');

		// orderData can be given as an integer
		var dataSort = init.aDataSort;
		if (typeof dataSort === 'number' && !Array.isArray(dataSort)) {
			init.aDataSort = [dataSort];
		}
	}
Provide backwards compatibility for column options. Note that the new options
are mapped onto the old parameters, so this is an external interface change
only.
 @param {object} init Object to map