Create releases and npm mpdule

[resteinbock]

Could you please make releases and publish npm modules as you make changes?

This is still the unofficial node sdk for Recurly, and it deserves that much.

Additionally, this would help reduce the number of forks as folks would not have to worry about their app breaking every time there are backwards-breaking changes (like a few days ago).

[resteinbock]

Check out our package https://www.npmjs.com/package/@akitabox/node-recurly https://github.com/akitabox/node-recurly