tiff2hdf: Use lzf compression when generating HDF5 files

Even with this compression, the storage is horribly inefficient, but
it's still about four times better than without this filter. Needs more
investigation why it's still so wasteful.
tiff2hdf.py --maxu: New parameter for storing op_maxu in the HDF5 file explicitly
Merge branch 'master' of github.com:nemaload/workflow-utils