Release nltk_contrib on PyPI

[gregmuellegger]

I find it unnecessarily difficult to install the nltk_contrib package as it is not published on PyPI. I know that you can still install with pip, but I want to list nltk_contrib in the dependency list in my setup.py file.

Please consider pushing a release to PyPI.

[jlmcgehee21]

This has plagued me for a while. I modified setup.py in my fork so that nltk_contrib can be installed via dependency links with pip. In your setup.py:

setup(
    ....
    install_requires=['nltk_contrib==3.1'],
    dependency_links=['git+https://github.com/jlmcgehee21/nltk_contrib.git#egg=nltk_contrib-3.1'], 
    ...
)

This removes the nltk dependency from setup.py itself, which I'm not sure would be accepted in a PR into master on this repo.