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**2013-04-24**
* Read and write CFA-netCDF files
* `cf.Field` creation interface
* New command line utilities: ``cfa``, ``cfdump``
* Redesigned repr, str and dump() output (which is shared with ``cfa``
and ``cfdump``)
* Removed superseded (by ``cfa``) command line utilities ``pp2cf``,
``cf2cf``
* Renamed the 'subset' method to 'select'
* Now needs netCDF4-python 0.9.7 or later (and numpy 1.6 or later)
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