Support for JPEG-LS

[tillmon]

Daikon supports JPEG-LS. Maybe it can be integrated. Alternative Daikon could be used for all decoding.

[ivmartel]

From Daikons' jpeg-ls.js#L1, the decoding is done via cornerstonejs/charls which is an emsripten build of team-charls/charls, a C++ JPEG-LS library implementation. I have to dig more to understand what are the modifications people from Daikon made to charls, but I think I would prefer to use cornerstonejs/charls directly.

And just as a ref: Lossless_JPEG#JPEG-LS on wikipedia.