Changes to make it work on current node.js version

Hey Andykent,

I was looking for a webhook delivery platform and found yours. its a good one but did not work for me at first as no deliveries made to the test server:request.in. Fixed below issues and now it works great. I do not know JS but googled around to make it work so review and accept. 

Any plans on providing reliability with a queuing backend?

- Updated the depreciated http.createClient to http.Request as existing
code doesnt work out of the box on new node.js version

- also the current version throws exception at request.close() API.
Changed it to request.end() works now.