allow port to be changed in nodize.json

[notslang]

It doesn't seem like there is any way to change the port that nodize runs on, other than editing app.coffee. It would be nice to specify which it uses since, for me, port 3000 is in use by another application.

[Hypee]

The way to define the port is to use the "PORT" environment variable :
PORT=80 NODE_ENV=production coffee app.coffee

I think it's quite usual in the Node.js world, but that's ok for me to add a parameter in the config file that will be used if no environment variable is defined.