updated readme

README.md

-# energy-storage-dtc
+Energy Storage DTC
+===========
 Sheffield-Southampton Energy Storage DTC materials
+
+Collection of teachig materials using the ONS' UK Time Use survey 2005:
+ * http://discover.ukdataservice.ac.uk/catalogue/?sn=5592
+
+###Terms of Use
+GPL: V2 - http://choosealicense.com/licenses/gpl-2.0/
+
+See license file for details.
+
+[YMMV](http://en.wiktionary.org/wiki/YMMV)
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