Data science and machine learning related additions

[paudan]

Added several interesting projects related to data analysis and machine learning, which I used or tested lately and which were missing from the list (remove them if them exist in late contributions, or move to other sections, if necessary):

Seaborn - data visualization library;
Keras - deep learning library for ANN;
RapydTk - Tk GUI builder tool. Haven't used it, but there aren't many similar tools, so I included it
bcolz - a young project but interesting for big data in-memory storage and analysis
paratext - a library for reading text files over multiple cores
caravel - AirBnB's data exploration platform written in Python
brew - ensemble learning methods in Python
FukuML- simple machine learning library, with focus on kernel methods
jubakit - Python bindings for a Jubatus distributed online machine learning framework
XGBoost - implementation of scalable, portable and distributed gradient boosting algorithm; considering its relevance, just ask any Kaggler :)
PyGMO - evolutionary computing for Python (might be moved to scientific computing section as well)

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