starting multiple workers in Procfile (development environment vs Heroku)
===

I have a simple Procfile that reads:

    web: bundle exec rails server thin -p $PORT
    worker: bundle exec rake jobs:work

On Heroku, this will launch N worker tasks, where N is whatever I've scaled it to be.

On my development system,

    $ foreman start

will only launch one worker task.  If I want to launch three workers, I need a Procfile that looks like:

    web: bundle exec rails server thin -p $PORT
    worker: bundle exec rake jobs:work
    worker: bundle exec rake jobs:work
    worker: bundle exec rake jobs:work

This is a somewhat pedantic question, but if I want my development environment to behave like my Heroku environment, what's the best way to launch N worker tasks?  Is the approved way to create (e.g.) Procfile_local and use it via `foreman -f Procfile_local`?
