Fix #199: Test comments to docstrings and use test name for output.

[Osmose]

Now, instead of showing the doctoring of a test, nose will show the function name of the test. Trick courtesy of andym.

All docstrings that were converted/written as normal comments have been moved back to docstrings, and wrapped to 72 characters as per PEP8 recommendations.

[Osmose]

@willkg r?

[willkg]

I suspect this is fine and Travis will give it a thumbs-up after we remove that "raise Exception" line. Everything else looks fine to me.