Add a partial image block version of the animation test.
Rename test images to make it clear what GIF features are being used.
Finalize test page content/layout.
- Add CGATS001-compatible "micro" ICC profile as a standard CMYK color space
(this is the default used by several Adobe applications)
- Add `PDFIO_CS_CGATS001` color space enum.
- Extend `pdfioArrayCreateColorFromStandard` to support CMYK.
- Extend `pdfioFileCreateImageObjFromFile` to support CMYK JPEG files.
- Update `pdfioFileCreatePage` to add default grayscale, RGB, and CMYK color
space resources as needed.
