These icons are based on work from the ubuntu-ui-toolkit [1] amd the 
ubuntu-html5-ui-toolkit [2].  As such, they are copyright Canonical 
Limited and are released under the LGPL version 3 or later.

Modifications to these icons are copyright 2014-2015 Robert Schroll.  
These modifications are also released under the LGPL version 3 or later.

[1] https://launchpad.net/ubuntu-ui-toolkit
[2] https://launchpad.net/ubuntu-html5-theme
