updated readme

NEED/README.md

@@ -9,6 +9,7 @@ http://discover.ukdataservice.ac.uk/catalogue/?sn=7518
 * Detailed documentation: https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/332169/need_anonymised_dataset_accompanying_documentation.pdf
 * Full coding details of variables at: https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/315189/need_dataset_look_ups.xlsx
 
+You may find that the scripts also work with the Public Use File (https://www.gov.uk/government/statistics/national-energy-efficiency-data-framework-need-anonymised-data-2014) but I have note tested this.
 ###Terms of Use
 GPL: V2 - http://choosealicense.com/licenses/gpl-2.0/