Remove libraries from the repo in favor of requirements.txt

I went ahead and moved every library I could find into requirements.txt. You can install them by creating a virtualenv, activating it and running `pip install -r requirements.txt`. I'm not sure if Visual Studio can do them all at once so you might have to do them either one at a time or run this on command line.

This closes issue https://github.com/MatthewCox/PyMoronBot/issues/46