Made nltk/__init__.py equivalent to setup.py

[tomaarsen]

Fixes #2509

Hello!

Pull request overview

• Made nltk/__init__.py equivalent to setup.py in terms of project description, classifiers, etc.

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Changes

I simply updated all dunder variables in nltk/__init__.py to be equivalent to their corresponding variables in setup.py. This includes changes to:

• Long description.
• Maintainer.
• Trove classifiers.

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Note

I simply copied the values from setup.py, but as a consequence two names are removed from the maintainer list here!

• Tom Aarsen

[stevenbird]

Thanks @tomaarsen, good catch!

[iliakur]

Would it be possible to reuse this string in setup.py directly? I dunno if that'll work, but seems like a good way to reduce duplication. Just to minimize the number of things we have to keep consistent...