Added express webserver

Can be loaded as a plugin from the config.
"plugins":  ['webserver.js']

And can be configured with a port and public directory
web_server_port default 80
web_server_dir default "public"

Put in jquery as we will no doubt require it for something.
Testing outputing some quadtree info and other zone / world info.

Try the url /info.
You will need to install express its optional however to do this and
load webserver.

npm install -g express
npm install express

Viewable distance of 500 seems to work great.