Add the option to make TorqueSpec a quieter

[mysteriouspants]

• Changes as many print statements as I could find to use an RSpec message call instead. This should cause any output to be emitted if the test fails, and otherwise not disrupt the lovely line of green dots we all know your specs produce.
• Adds a verbose configuration option (on by default to be closer to original functionality).

This might need some tweaking for acceptance criteria, but keeping the output as terse as possible (until something blows up - then I want data) is important to me, so I figure'd I'd make a PR for this one.

As an example of the lovely quietness this can bring, I present this screenshot: http://nserror.me/upsht/upshot_quieterTorquespec.png

[jcrossley3]

Merged with slight modifications. Thanks!

[mysteriouspants]

Awesome! Thank you!