added more licensing info

The CLDR license appears to require that the locale-data files have
a license in each, so this PR adds that as well.
(start of) add copyright when rebuilding locale-data
updated URL in tools/getIntlData.js
reverted licensing header in locale-data files
Merge branch 'licensing' of https://github.com/drewfish/Intl.js into drewfish-licensing

Conflicts:
	README.md