Nltk-ma

Adrian Ellis, Andrew Martin, Ayush Kaushal, BLKSerene, Bharat
Raghunathan, Franklin Chen, KMiNT21 Kevin Brown, Liling Tan,
Matan Rak, Nat Quayle Nelson, Osman Zubair, Purificant,
Uday Krishna, Viresh Gupta

* Support Python 3.7
* Language Modeling incl Kneser-Ney, Witten-Bell, Good-Turing
* Cistem Stemmer for German
* Support Russian National Corpus incl POS tag model
* Decouple sentiment and twitter packages
* Minor extensions for WordNet
* K-alpha
* Fix warning messages for corenlp
* Comprehensive code cleanups
* Many other minor fixes
* Switch continuous integration from Jenkins to Travis

Special thanks to Ilia Kurenkov (Language Model package), Liling Tan (Python 3.7, Travis-CI),
and purificant (code cleanups). Thanks also to: Afshin Sadeghi, Ales Tamchyna, Alok Debnath,
aquatiko, Coykto, Denis Kataev, dnc1994, Fabian Howard, Frankie Robertson, Iaroslav Tymchenko,
Jayakrishna Sahit, LBenzahia, Leonie Weißweiler, Linghao Zhang, Rohit Kumar, sahitpj,
Tim Gianitsos, vagrant, 53X

* Support Python 3.6
* New interface to CoreNLP
* Support synset retrieval by sense key
* Minor fixes to CoNLL Corpus Reader, AlignedSent
* Fixed minor inconsistencies in APIs and API documentation
* Better conformance to PEP8
* Drop moses.py (incompatible license)

Special thanks to Liling Tan for leading our transition to Python 3.6.
Thanks to other contributors listed here: https://github.com/nltk/nltk/blob/develop/AUTHORS.md

Ali Abdullah, Lakhdar Benzahia, Henry Elder, Campion Fellin,
Tsolak Ghukasyan, Thanh Ha, Jean Helie, Nelson Liu,
Nathan Schneider, Chintan Shah, Fábio Silva, Liling Tan,
Ziyao Wei, Zicheng Xu, Albert Au Yeung, AbdealiJK,
porqupine, sbagan, xprogramer

Alex Constantin, Hatem Nassrat, Liling Tan

Mark Amery, Carl Bolz, Abdelhak Bougouffa, Matt Chaput, Michael Goodman,
Jaehoon Hwang, Naoya Kanai, Jackson Lee, Christian Meyer, Dmitrijs Milajevs,
Adam Nelson, Pierpaolo Pantone, Liling Tan, Vilhjalmur Thorsteinsson,
Arthur Tilley, jmhutch, Yorwba, eromoe and others