ICONS LICENSE
===============

* crs.png is licensed under Creative Commons Zero 1.0 Public Domain License (http://creativecommons.org/publicdomain/zero/1.0/). It has been created by Cesar Martinez Izquierdo from the result of a gnuplot script (see http://www.gnuplotting.org/plotting-the-world/). The plot has been exported to SVG and then edited using Inkscape.

* crs_add.png, ct.png and ct_add.png have been created by composing crs.png with some icons of Chalkwork icon family. The composition si based on a previous work by Joaquin Jose del Cerro.

* All the rest of icons are based on the Chalkwork icon family and are licensed under the Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License. See "License_Chalkwork_icons.txt" for details.