Add Cube.intersection()
load_cube now uses merge_cube
Review tweaks
Merge pull request #1027 from rhattersley/extract-wrapped-lons

Add Cube.intersection()
Merge pull request #1026 from niallrobinson/load_cube_merge_report

load_cube now uses merge_cube
Backed out unify_time_units call in _concatenate
DOC: Resolves feedback on the statistics docs.
Merge pull request #1029 from dkillick/back_out_concat

Backed out unify_time_units call in concatenate
Merge pull request #1018 from pelson/further_links_in_userguide

DOC: Resolves feedback on the statistics docs.
Added a custom aggregator example.
Merge pull request #1030 from pp-mo/custom_agg_eg

Added a custom aggregator example.
Added support and test for mixed-case calendar strings
Merge pull request #1000 from dkillick/agnostic_calendar_strings

Support for mixed-case calendar strings
Added gallery example for plotting in different projections.
Merge pull request #1037 from pp-mo/project_eg

Plotting projections example
ENH: Added UTMz32 grid to extend NIMROD loading.

This adds the UTM zone 32 coordinate system to iris (using the existing
crs within cartopy) and adds capability to the NIMROD loader to load
data on this grid.