adding setup.py and python-goose repo w/o nltk dependency

I know you just added a setup.py, but I noticed that it still downloaded nltk. This is what we talked about in my last pull request. I added a python-goose directory that has the nltk dependencies removed and a setup.py that downloads all dependencies and installs the modified version of python-goose. The tests.py file still works with this version.

EDIT: Edited the setup.py to be more like the one you have now.