Library updates...

Hey,

I was really happy to find your node-impact server on Github. It was recommended in the book "HTML 5 Game Development" from O'Reilly by Jesse Freeman.

I noticed it was a little bit out of date, so, I went ahead and updated a few things. I'd prefer not to completely fork the project, so, I thought I'd issue a pull request to see if you are interested in my updates. Feel more than welcome to pull them in, but, please note a few changes to the package.json file that you may want to change (specifically, the "name" and "repository" sections). I'm sure this goes without saying, but, please do leave my name in as a contributor though if you pull my changes.

Thanks!
Christopher McCulloh