On Debian systems, the complete text of the GNU General Public License
can be found in the file /usr/share/common-licenses/GPL.
+
+The file "code/static/power_installing.png" is from the Human-O2 icon
+set by Oliver Scholtz and is released under the "GNU/GPL" (source:
+http://www.iconfinder.net/icondetails/24350/128/ -
+http://schollidesign.deviantart.com/art/Human-O2-Iconset-105344123)