The original authors of LIBMF are:
    Chih-Jen Lin
    Yu-Chin Juan
    Yong Zhuang
    Wei-Sheng Chin

The code in file src/memalign.cpp is based on an answer in
Stack Overflow: http://stackoverflow.com/a/6563989/3152208
Credit goes to the author of this answer, "Node"
(http://stackoverflow.com/users/754373/node).
