Reorder GRIB/CF map entries.
Proposed addition to allow categorisation of 2D coords
Review actions
Default LBUSER(2) to -99 when saving to PP
tests around bounds, and messages on DimCoord constructor errors
Fix docs for COUNT and PROPORTION aggregators.
modify documentation of cube constructor to reflect a wider range of data types
Merge pull request #866 from rhattersley/pp-lbuser2

Default LBUSER(2) to -99 when saving to PP
Merge pull request #867 from rhattersley/fix-count-docs

Fix docs for COUNT and PROPORTION aggregators.
Merge pull request #865 from jkettleb/bounds_doc

Documentation clarifying shape of bounds, adding tests to verify expected behaviour
Add units support to Aggregators.
Merge pull request #862 from jkettleb/doc

Small modification to documentation around cube constructor
Merge pull request #861 from dkillick/coord_cat_2d

Categorisation of multi-dimensional coords.
Fix test results
Merge pull request #853 from bjlittle/reorder_grib_cf_map

Cosmetic reorder of GRIB/CF map entries.
review actions
Merge pull request #874 from bblay/doy_postmerge

(small) Follow up to #839
Merge pull request #869 from rhattersley/aggregator-units

Add units support to Aggregators.