Also, allow disconnect endpoint to force things

Should reduce situations where requests arrive before locks are registered, putting daemon into restart loop.

Also, lock/unlock requests now attempt to override any existing connections.

On second thought, kill the process when unregistered locks are found, as state is not reliable or repairable.

Also, register "missing" locks if requests come in before lock configs are loaded.

Resolves issue where lock would remain connected, blocking subsequent requests (and those from the official apps) until the node server was restarted.

The newest Android app exposes the "offline keys" in a different way than previous versions.

Change npm install to global, and add some additional documentation regarding key retrieval on the iPhone.