Section 5 JPEG2000 support

[measuredweighed]

I'm working with the library to decode JPEG2000 data as spec'd here. I'd like to put together a pull request with my work but am unsure how the maintainers wish to handle decoding of the JPEG2000 format.

It doesn't appear that anyone has put together a native Go JPEG2000 decoder and as such I've been making use of gographic's Imagick bindings to convert the data into a native Image instance.

Would this work still be of value to the project given that it introduces two dependencies (the Imagick binding and the imagemagick binary suite)?

[nilsmagnus]

Hi!

I think a pr om this would be interesting and valuable to the project. If you make a PR and it works I will merge it into the main branch👍