Liffile

- Support LOF files without LMSDataContainerHeader XML element.

- Support stride-aligned RGB images.

- Rename LifFileFormat to LifFileType (breaking).
- Rename LifFile.format to LifFile.type (breaking).

- Support case-sensitive file systems.
- Support OMETiffBlock, AiviaTiffBlock, and other memory blocks.
- Remove LifImageSeries.items and paths methods (breaking).
- Deprecate LifImage.xml_element_smd.
- Fix LifImage.parent_image and child_images properties for XML files.
- Work around reading float16 blocks from uint16 OME-TIFF files.

- Support LIFEXT files.
- Remove asrgb parameter from LifImage.asarray (breaking).
- Do not apply BGR correction when using memory block frames.
- Avoid copying single frame to output array.
- Add LifImage.parent_image and child_images properties.
- Add LifImageSeries.find method.

- Support XLEF and XLCF files.
- Rename LifFile.series property to images (breaking).
- Rename imread series argument to image (breaking).
- Remove LifImage.index property (breaking).
- Add parent and children properties to LifFile.
- Improve detection of XML codecs.
- Do not keep XML files open.