Print process PID for running application

Created by: Pajn

Is this a bug report?

No, a feature request.

When something is detected as already running on a port, c-r-a prints a helpful message. However most of the time it's me that have not closed an earlier project and it looks like this:

Something is already running on port 3000. Probably:
  node scripts/start.js
  in /path/to/project

it would be helpful if the pid was printed as well so I could just shoot it down instead of trying to find an open terminal. This information is already known by the code so it would just need to be added to the output.

What do you think?