czinspect: perform in-line conversion from JPEG-XR to other formats

[sysvinit]

The image format used by tiles in a .czi file is usually JPEG-XR, which is unwieldy for a lot of applications as the image format is not common, which necessitates format conversion. Adding support for czinspect to do this in-line after extraction would remove the need for external tooling to do this after the fact.

The proposed model is to extract a JXR image tile and then fork+exec JxrDecApp from jxrlib to convert to TIFF. Further conversions could then be performed with other programs such as vips or ImageMagick's convert.

[magnostherobot]

JxrDecApp can output in formats other than TIFF: from JxrDecApp --help:

  -o output.bmp/tif/jxr        Output image file name
                               bmp: <=8bpc, BGR
                               tif: >=8bpc, RGB
                               jxr: for compressed domain transcode

  -c format                    Specifies the uncompressed output format
                                0: 24bppBGR
                                1: 1bppBlackWhite
                                2: 8bppGray
                                ...
                               33: 80bppCMYKA
                               34: 32bppBGR

I'm uncertain how useful these filetypes will be, but they might make some conversions faster/simpler.