lambert grib
PEP 8 iris.cube
PEP 8 iris.coord_categorisation
PEP 8 iris.aux_factory
BUG: Fix pandas test for version update

Iris pandas unit test currently fails due to a dtype mismatch between
what pandas Timestamp class can handle with v.11 compared to v.12  This
commit converts the input argument which instantiation this class
to an integer, which is commonly accepted by both versions of pandas.
Merge pull request #650 from cpelley/pandas_version_fix

BUG: Fix pandas test for version update
Merge pull request #644 from rhattersley/pep8-iris.aux_factory

PEP 8 iris.aux_factory
Merge pull request #646 from rhattersley/pep8-iris.cube

PEP 8 iris.cube
Merge pull request #649 from ajdawson/extest-show

Support qplt.show in extest.
Merge pull request #561 from bblay/lambgrib

Lambert conformal grib2 loading
ENH: Optimised unit equality special method

This commit results in a 5.4% gain over the _OrderedHashable equality
method utilised for unit comparison.  This implements an interface
through ctypes to UDUNITS ut_compare for efficient unit comparison.
Merge pull request #651 from cpelley/unit_str

ENH: Optimised unit equality special method
Merge pull request #645 from rhattersley/pep8-iris.coord_categorisation

PEP 8 iris.coord_categorisation
Fixup comments
Merge pull request #654 from rhattersley/pep8-iris.coord_categorisation

PEP 8 follow-up: fixup comments in iris.coord_categorisation
Add new ocean profile plot example.