Doc2Vec visualisation

2.1.0, 2017-05-12

🌟 New features:

• Add modified save_word2vec_format for Doc2Vec, to save document vectors. (@parulsethi, #1256)

👍 Improvements:

• Add automatic code style check limited only to the code modified in PR (@tmylk, #1287)
• Replace logger.warn by logger.warning (@chinmayapancholi13, #1295)
• Docs word2vec docstring improvement, deprecation labels (@shubhvachher, #1274)
• Stop passing 'sentences' as parameter to Doc2Vec. Fix #511 (@gogokaradjov, #1306)

🔴 Bug fixes:

• Allow indexing with np.int64 in doc2vec. Fix #1231 (@bogdanteleaga, #1254)
• Update Doc2Vec docstring. Fix #1302 (@datapythonista, #1307)
• Ignore rst and ipynb file in Travis flake8 validations (@datapythonista, #1309)

📚 Tutorial and doc improvements:

• Update Tensorboard Doc2Vec notebook (@parulsethi, #1286)
• Update Doc2Vec IMDB Notebook, replace codesc to smart_open (@robotcator, #1278)
• Add explanation of size to Word2Vec Notebook (@jbcoe, #1305)
• Add extra param to WordRank notebook. Fix #1276 (@parulsethi, #1300)
• Update warning message in WordRank (@parulsethi, #1299)