Documentation change on coordinates parameter for slices()

Update to first line of docstring.

changed sub cubes to subcubes

Documentation change on coordinates parameter for slices()

Update to first line of docstring.

changed sub cubes to subcubes

Update to first line of docstring.

changed sub cubes to subcubes
Merge pull request #510 from munslowa/slices_documentation_update

Documentation change on coordinates parameter for slices()
Missing import
Merge pull request #513 from esc24/missing_import

Missing import
Resolved pickling issues with deferred loading.
Merge pull request #511 from esc24/lazy_array_del

Resolved pickling issues with deferred loading.
New pp rule to calculate forecast period.
Fixed PEP8 issues in netcdf.py
Merge pull request #515 from esc24/pep8_netcdf

Fixed PEP8 issues in netcdf.py
Added ESMPy conservative regrid.
Merge pull request #453 from pp-mo/esmf_conserve

Conservative regridding using ESMPy
BF - handle missing values from grib messages
Merge pull request #520 from ajdawson/grib-missing-values

BF - handle missing values from grib messages
Moved to SHA for iris-test-data until we tag the next release.
Merge pull request #523 from esc24/travis_test_data_bump

Moved to SHA for iris-test-data until we tag the next release.
Modified plot.py to pass coords arg through to _map_common()
Review actions.
Revised grib load+save: extra levels translation, and grib <-> cf phenomenon translation from metadata project.
Merge pull request #482 from pp-mo/grib_translation

Revised grib load+save
Review actions.