Create license

Creative Commons license http://creativecommons.org/publicdomain/zero/1.0/
Update license

Changed license to CC BY-NC-SA 4.0
Upload new data file with new geolocations and combined entries for identical address or geolocation
Merge pull request #7 from childcaremap/license

Create license
Update README.md

Include license information
Merged master into gh-pages to update