Nltk: Add wheel distribution(s) to PyPI

If that's all it is, I'd be happy to give it a try

@stevenbird I see that there's an sdist in the Makefile. Just to confirm, is the current way that the maintainers upload to PyPi to use make dist (on a local machine) and then uploading dist/ with twine?

Cool trick: the wheel can be tested directly by tox via --installpkg. These are passing:

$ pyenv local 3.8.2 3.7.7 3.6.10 3.5.9
$ python -m venv venv
$ source ./venv/bin/activate
$ python -m pip install -U pip setuptools wheel
$ python setup.py bdist_wheel
$ . tools/travis/pre-install.sh
$ chmod +x tools/travis/coverage-pylint.sh
$ chmod +x tools/travis/third-party.sh
$ . tools/travis/install.sh
$ tox --installpkg dist/nltk-*.whl

@bsolomon1124 I'll package a new release in the coming days, so we can get this out.

Great @stevenbird. I recommend running check-wheel-contents on the wheel as one last sanity check to look for things that might not rear their head with an sdist alone.

Edit: I went ahead and did this, and it looks like the only finding is a false positive:

$ check-wheel-contents nltk-3.5-py3-none-any.whl 
nltk-3.5-py3-none-any.whl: W002: Wheel contains duplicate files:
  nltk/test/corpus_fixt.py
  nltk/test/translate_fixt.py

Hello, Thanks for working on this! I know they will be released soon but is there a way to access these Wheels at the moment? if not How can I build them locally?

@notAmine if you've cloned from Git, you should be able to build wheels via python setup.py bdist_wheel as shown above.

As of today there is still no wheel uploaded to PyPI. Are there plans to do this? It seems like it would be a trivial thing to do.