Version 0.8

1. Sentiment and Toxicity analysis now will use naive_stemmer to classify.
2. Toxicity analysis now supported ['bahdanau', 'hierarchical', 'luong', 'fast-text', 'entity-network']
3. No longer depends on Keras.
4. No longer have any CNN based model due to CuDNN unstable.
5. Added entity-network for sentiment and toxicity analysis.
6. Added bert for sentiment analysis.
7. Generated readthedocs documentation, https://malaya.readthedocs.io/en/latest/
8. House keeping.