@luislavena thanks! the spawning/killing code in Poltergeist is here: https://github.com/jonleighton/poltergeist/blob/master/lib/capybara/poltergeist/client.rb

We currently use SIGTERM, wait for two seconds and then do a SIGKILL if it's still not dead. How should this be changed for Windows? (Assuming we use `:new_pgroup => true`.)