Update URL to Node.js port of KSS

The old URL for the Node.js port ( https://github.com/hughsk/kss-node ) has changed because hughsk has agreed to move the project to a kss-node GitHub organization. While the old URL _does_ redirect to the new URL, it would be nice to update the KSS readme with the new URL.
Merge pull request #102 from JohnAlbin/patch-1

Update URL to Node.js port of KSS