[sldev] Lossless image uploading

[John Hurliman]

Some people on this list have requested a way to upload lossless 
textures for sculpt maps, and my two latest libsecondlife utilities 
allow you to do that:

https://wiki.secondlife.com/wiki/Importprimscript
https://wiki.secondlife.com/wiki/SLImageUpload

Not to mention the GPL viewer using OpenJPEG will also upload single 
layer, lossless images (this can create huge files, over 1MB). Patch for 
that is here: https://jira.secondlife.com/browse/VWR-1475

John Hurliman