#6 Make PID avaialble

[Claude Robitaille]

Is it possible to make the PID available? Currently, it is stored in a private member and I do not see an accessor to get it. I would liek to get it so that I can write my SIGCHLD handler in such a way to associate the signal to the correct child if I start more than 1. I am sure there could be other useful usage for the PID.

Thanks

[Jonathan Wakely]

It's true there is no accessor for this, and the use case makes sense. I'll add it.