- Add option to append images to existing TIFF files.
- Read files without pages.
- Read S-FEG and Helios NanoLab tags created by FEI software.
- Allow saving Color Filter Array (CFA) images.
- Add info functions returning more information about TiffFile and TiffPage.
- Add option to read specific pages only.
- Remove maxpages argument (breaking).
- Remove test_tifffile function.