Books are downloaded from 
	wolnelektury.pl
and are under CC BY-SA 3.0 license (https://creativecommons.org/licenses/by-sa/3.0/)


python/mapper.py and python/reducer.py are copied from http://www.michael-noll.com/tutorials/writing-an-hadoop-mapreduce-program-in-python/

All other components are licensed under MIT License