Version 1.0

Malaya released first beta version, V1.0!

1. Major housekeeping, old APIs totally replaced by new APIs.
2. Added subjectivity analysis, https://malaya.readthedocs.io/en/latest/Subjective.html.
3. Added stacking module, https://malaya.readthedocs.io/en/latest/Stack.html.
4. Added clustering module, https://malaya.readthedocs.io/en/latest/Cluster.html
5. Added visualization for word2vec, https://malaya.readthedocs.io/en/latest/Word2vec.html
6. Build systematic caching system, https://malaya.readthedocs.io/en/latest/Cache.html