Cf-python

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**2016-02-09**

* Bug fix to `cf.Field.autocyclic`
* Bug fix to `cf.Field.clip` - now works when limit units are supplied
* New methods: `cf.Data.round`, `cf.Field.Round`
* Added ``lbtim`` as a `cf.Field` property when reading UM files
* Fixed coordinate creation for UM atmosphere_hybrid_height_coordinate
* Bug fix to handling of cyclic fields by `cf.Field.regrids`
* Added nearest neighbour field regridding
* Changed keyword ignore_dst_mask in `cf.Field.regrids` to
use_dst_mask, which is false by default

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**2015-12-10**

* Bug fixes to `cf.Field.collapse` when the "group" parameter is used
* Correct setting of cyclic axes on regridded fields
* Updates to STASH_to_CF.txt table: 3209, 3210

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**2015-12-01**

* Updates to STASH_to_CF.txt table
* Fixed bug in decoding UM version in `cf.um.read.read`
* Fixed bug in `cf.units.Utime.num2date`
* Fixed go-slow behaviour for silly BZX, BDX in PP and fields file
lookup headers

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**2015-11-05**

* Fixed bug in decoding UM version in `cf.read`

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**2015-10-28**

* Fixed bug in `cf.Units.conform`
* Changed `cf.Field.__init__` so that it works with just a data object
* Added `cf.Field.regrids` for lat-lon regridding using ESMF library
* Removed support for netCDF4-python versions < 1.1.1
* Fixed bug which made certain types of coordinate bounds
non-contiguous after transpose
* Fixed bug with i=True in `cf.Field.where` and in
`cf.Field.mask_invalid`
* cyclic methods now return a set, rather than a list
* Fixed bug in _write_attributes which might have slowed down some
writes to netCDF files.
* Reduced annoying redirection in the documentation
* Added `cf.Field.field` method and added top_level keyword to
`cf.read`
* Fixed bug in calculation of standard deviation and variance (the bug
caused occasional crashes - no incorrect results were calculated)
* In items method (and friends), removed strict_axes keyword and added
axes_all, axes_superset and axes_subset keywords

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**2015-06-23**

* Added default keyword to fill_value() and fixed bugs when doing
delattr on _fillValue and missing_value properties.