Tifffile

- Parse nested OmeXml metadata argument (WIP).
- Do not lazy load TiffFrame JPEGTables.
- Fix conditionally skipping some tests.

- Do not auto-enable OME-TIFF if description is passed to TiffWriter.save.
- Raise error writing empty bilevel or tiled images.
- Allow to write tiled bilevel images.
- Allow to write multi-page TIFF from iterable of single page images (WIP).
- Add function to validate OME-XML.
- Correct Philips slide width and length.

- Initial support for writing OME-TIFF (WIP).
- Return samples as separate dimension in OME series (breaking).
- Fix modulo dimensions for multiple OME series.
- Fix some test errors on big endian systems (18).
- Fix BytesWarning.
- Allow to pass TIFF.PREDICTOR values to TiffWriter.save.

- Deprecate support for Python 3.6 (NEP 29).
- Move pyramidal subresolution series to TiffPageSeries.levels (breaking).
- Add parser for SVS, SCN, NDPI, and QPI pyramidal series.
- Read single-file OME-TIFF pyramids.
- Read NDPI files > 4 GB (15).
- Include SubIFDs in generic series.
- Preliminary support for writing packed integer arrays (11, WIP).
- Read more LSM info subrecords.
- Fix missing ReferenceBlackWhite tag for YCbCr photometrics.
- Fix reading lossless JPEG compressed DNG files.

- Support os.PathLike file names (9).

- Re-add pure Python PackBits decoder.