[sldev] Windlight source drop

[Soft]

I've added Windlight to the automated source drops, which will
normally happen Fridays. Subscribe to sldev-commits to see updates
weekly at the least.

Tarballs linked from the commit messages, for example at the bottom of:
https://lists.secondlife.com/pipermail/sldev-commits/2008-January/000349.html

Subscribe to the list here:
/index.html-commits

Fuller information about these drops here:
https://lists.secondlife.com/pipermail/sldev/2008-January/007959.html