Copyright (C)  2015  ParallelDots.
    Permission is granted to copy, distribute and/or modify any document in this repository
    under the terms of the GNU Free Documentation License, Version 1.3
    or any later version published by the Free Software Foundation;
    with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts.
    A copy of the license is included in the section entitled "license".