Added license block to AmigaLink captcha engine and set this engine as the default; clarified licensing situation for this module in licenses/index.html
The images in this folder are from the Tango Desktop Project at
http://tango.freedesktop.org. The SVG files and the rendered PNGs are available
under the Creative Commons Attribution-ShareAlike license, which can be viewed
in the /licenses directory in the Enano package.