User Guide section on time constraints with PartialDateTime and iris.FUTURE.cell_datetime_objects.
Review actions.
Remove TimeConstraint entirely.
Clearer time selection example.
Support 1-D array attributes.  Moved some results files.
Reverted 9676bf3 from PR #839 thanks to the addition of PartialDatetime.
Merge pull request #796 from pp-mo/array_attribs

Support 1-D array attributes.  Moved some results files.
Tidied test expression.
Further improvements to time selection example.
Merge pull request #896 from pelson/delete_time_range

Reverted 9676bf3 from PR #839 thanks to the addition of PartialDatetime.
Merge pull request #898 from rhattersley/fix-fix-abf

Ensure patched ABFField methods are always reverted
Merge pull request #890 from pp-mo/time_docs

User Guide section on time constraints.
Switch to biggus for deferred loading.
PPDataProxy exposes consistent dtype
Update tests.
Remove obsolete import.
Convert to Numpy/Ortho adapters
Update test
Revert test
Preserve old merge behaviour