This is the first of many commits that gradually convert PEG.js's test
suite from QUnit to Jasmine, cleaning it up on the way.
Main reason for the change is that Jasmine allows nested contexts,
allowing to structure the tests in a better way than QUnit. Moreover,
the tests needed to be cleaned up a bit.
The engine's and dependencies' versions are the ones I've tested with.
Lower version will probably work too, but I don't want to spend more
time testing now so I'll play it safe.
David Majda