New / Updated Deps for NodeJS Developers

Hi! 

I have updated the nginx.src in the following ways:
* Upgrade to nginx 1.4.1
* Remove separate upload status mod (incl in 1.4.1)
* Include google pagespeed build (but configuration needs to be manual)
* Include new proxy type to proxy upstream to a websockets-enabled server

Would love to have a discussion about how these changes might be integrated into $HEAD.