quiet option for spork

[debreczeni]

This adds a very simple quiet option for launching spork server to omit the "Running tests with args #{argv.inspect}..." and "Done.\n\n"

In your Guardfile start spork with:

    guard 'spork', :quiet => true do
      ...
    end

here's the related pull request for spork that makes this work:
sporkrb/spork#163

[thibaudgg]

:silent would be more excepted, don't you think?

[debreczeni]

I don't mind :)

[arronmabrey]

I just asked the spork guys what the status was for issue. Just keeping it alive.

[thibaudgg]

Thanks!

[mikesmullin]

+1 for this. very annoying without it
http://i.imgur.com/MnQl0.png

[thibaudgg]

Done in #75