Bug 1019672 Add steps: pip, setup.py and running unit tests.

@bitgeeky r? If everything looks ok to you, we can run it by Bob.
I don't see much of code that installs any packages here [0]
We already install packages using pip, I am not sure if we really need it. Do you have any reason to add this @mjzffr  ?
[0] https://github.com/mozilla/oneanddone/blob/master/setup.py