Free-licensed

This image is available under either the GFDL version 1.3 or the CC-by-sa version 3.0. Essentially, this gives you the following rights:

Copy and distribute this image all you like.

All copies must reference the license(s) and be attributed to me, Tim McCormack.

If you distribute a modified version of the image, you must keep the license and attribution, but are entitled to attach your own name and list of modifications.

If you want to use this image without attribution, I may offer you an alternate license in return for compensation. Contact me with a proposal.