License to public domain for any purpose

The author appears to have informally stated that this code may be freely used for any purpose without any restriction, so I'm suggesting that the code be licensed under CC0 (zero copyright / no rights reserved / public domain).

See:
http://creativecommons.org/about/cc0
http://creativecommons.org/publicdomain/zero/1.0/legalcode
Added license note
Update README
Merge pull request #3 from jacobq/master

Add LICENSE file