Progress towards deploying apps to galaxy

Mostly changing "service" to "app"
Put ctl in meteor instead of galaxy
Factor out most of ctl into a ctl-helper package

We use ctl-helper on galaxy in the proxy control program.
Send port to proxy as Number, not string
Prevent ctl from choosing a port at random.

When deploying an app to galaxy, localPort: 0 in the deployConfig was overriding
the port assigned by satellite to the server, so the server's port was being
chosen at random, so I removed localPort from the deployConfig. (Not 100% sure
this is the right fix.)
Deploying a simple app to galaxy works now, woohoo!