Removed old example comment from deployment script. Explicitly tell capistrano to restart the Passenger app after deploying it.

From Capistrano 3.1 onwards the app is not automatically restarted after redeploying. It's necessary to explicitly include a restart step after the publish step if we want the app to be restarted every time (which we do for this app).

For more details see the Capistrano 3.1.0 changelog:

  https://github.com/capistrano/capistrano/blob/master/CHANGELOG.md