OpH5WriterBigDataset: Use gzip compression instead of lzf, which is only used by h5py.
OpH5WriterBigDataset: Minor cleanups (unused variables).
tests: Added testMultislotResize.py
(I don't remember when or why I wrote this test, but it passes, so why not add it...)
stype: ArrayLike.setupMetaForValue uses isinstance() instead of hasattr()
MetaDict: Implemented updateFrom().
Added new operators: OpDtypeView, OpMaskedSelect, OpMaskedWatershed, OpSelectLabel