remove cucumber.no.de link

From #102, I just removed couple of lines mentioning [cucumber.no.de](http://cucumber.no.de) from README.md and CONTRIBUTOR.md. Not sure if there is a better alternative or not.. probably @jbpros would know..?

My first time trying out cucumber.js coming from rb, and was confused by the broken link. Maybe this will make other new comers less confused :)