- Support colormaps per channels via the colors argument.
- No writer process anymore, the pool writes to the file by using a filehandle with a lock.
- Can save extra tiff tags in every frame and/or per frame individually.
- Header and IFD classes with support for reading files.
- Multiplexing is now done automatically when multiple IJTiffFiles are initialized: the process pool is shared by all IJTiffFiles.
