README documentation link

This is a bit trivial, but nevertheless, it's a bit off-putting to get an error in step one of Getting Started.

http://docs.outerthought.org/lily-docs-2_0/414-lily.html redirects to http://docs.ngdata.com/lily-docs-2_0/414-lily.html which throws a ResourceNotFoundException.

I think you just want this link to be: http://docs.ngdata.com/lily-docs-trunk/414-lily.html