[theora] NHW Project - new release

[Raphael Canut]

 Hello,

For those interested, I have made a new version of NHW.This one has more
precision and a little more neatness.

I still find that NHW has a very good neatness -which I find visually more
pleasant than AVIF and x265 for example-, and NHW is still extremely fast
to encode/decode, faster than JPEG!

There are still many improvements that can be done, first one is to adapt
to any arbitrary image size this proof-of-concept, and for that I wanted to
let you know (again...) that I am searching for a sponsor, but it's
extremely difficult to "exist/survive" outside of AOM and MPEG.

I don't have touched the entropy coding schemes, and so we can still save
2.5KB in average per .nhw file.I'll also try to document on the Chroma from
Luma technique as it'll save additional bits on chroma compression.

More of this release at: http://nhwcodec.blogspot.com/

Cheers,
Raphael
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