#196 Make unittest built in and integrate with setuptools

[Anthony Oliver]

It would be much nicer to just run:
import SimpleCV.test
SimpleCV.test()

and have it run all the unit test. I think this should now be included with the package as it also integrates with setuptools.

I also think this would be an extremely useful tool in trouble shooting, as we should also maybe add system info to unit test, so if someone is having problems we say run the test, dump the output. From that we know what SImpleCV version, OS, if things are running clean from the lib side and it's not just their code, etc.