Register a new process in self.processes later
Register a new process in self.processes later

This reduces the chances of ending up with an entry in self.processes
that refers to a process that is not even running. Ideally, this should
be done as a callback of the started deferred for this process.

pyfarm/pyfarm-agent,guidow/pyfarm-agent,guidow/pyfarm-agent,pyfarm/pyfarm-agent,guidow/pyfarm-agent,pyfarm/pyfarm-agent