parabola image sources:
  https://wiki.parabola.nu/File:Parabola_logo,_GNU_and_Bola.svg.png
  https://wiki.parabola.nu/File:Wallpaper_Parabola_Landscape_r800x450px.png

This is Free work, you can redistribute it and/or modify it under the terms of either:

    The Free Art License as published by Copyleft Attitude; either version 1.3, or (at your option) any later version,
    or
    The Creative Commons Attribution-ShareAlike 4.0 International License as published by Creative Commons; either version 4.0, or (at your option) any later version,
    or
    The GNU Free Documentation License as published by the Free Software Foundation; either version 1.3, or (at your option) any later version; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts
