References
http://docs.julialang.org/en/release-0.4/manual/
https://github.com/pluskid/Mocha.jl
http://psych.utoronto.ca/users/reingold/courses/ai/nn.html
https://www.microsoft.com/en-us/research/wp-content/uploads/2016/02/DeepLearning-NowPublishing-Vol7-SIG-039.pdf
http://www.deeplearningbook.org/contents/intro.html
http://deeplearning.net/tutorial/deeplearning.pdf