Answers to UFLDL Tutorial(http://ufldl.stanford.edu/wiki/index.php/UFLDL_Tutorial)
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Reference:
http://www.cnblogs.com/tornadomeet/category/361811.html
https://github.com/dkyang/UFLDL-Tutorial-Exercise