H5netcdf

- Special thanks to `Kai Mühlbauer <https://github.com/kmuehlbauer>`_ for
stepping up as a co-maintainer!
- Support for ``decode_strings``, to restore old behavior with h5py 3.
By `Kai Mühlbauer <https://github.com/kmuehlbauer>`_.

- Fix h5py deprecation warning in test suite.

- Support for reading Datasets with missing dimension scales.
By `Kai Mühlbauer <https://github.com/kmuehlbauer>`_.
- Fixed a bug where ``Datatype`` objects were treated as ``Datasets``.
- Fixed several issues with upstream deprecations.

- Fixed a flakey test on Python 2.7 and 3.4.

- Fixed another bug that could result in reusing dimension IDs, when modifying
existing files.

- Fixed a bug where h5netcdf could write invalid netCDF files with reused
dimension IDs when dimensions are written in multiple groups.
netCDF-C 4.6.2 will crash when reading these files, but you can still read
these files with older versions of the netcdf library (or h5netcdf).
- Updated to use version 2 of ``_NCProperties`` attribute.