NF - When a user tries to perform an aggregate_by that tries to collapse an uncollapsible coord (e.g. a string based coord), then an informative error message is raised
Tweak message and add a test
Make tests optional that depend on pydot and pandas (optional installs).
Merge pull request #479 from pp-mo/options_tests

Make tests optional that depend on pydot and pandas (optional installs).
Merge pull request #504 from rhattersley/aggregate-tweak-rebase

Aggregate by on str dim err handling
Modified linear() to handle non-scalar length one coords.
Review actions
Fixed scalar issues.
propogate all coord names in construct midpoint
Merge pull request #508 from esc24/extrapolate_single_pt

Modified linear() to handle non-scalar length one coords.
Merge pull request #499 from esc24/coord_name_repl_bug

Propogate all coord names in construct midpoint
Load of nimrod files with multiple fields and period of interest

Signed-off-by: Andrew Munslow <munslowa@gmail.com>
Update post PR review

Signed-off-by: Andrew Munslow <munslowa@gmail.com>
Test result for period of interest test

Signed-off-by: Andrew Munslow <munslowa@gmail.com>
Use updated version of test data

old test files removed. extra newline added

test_osgb_to_latlon now uses the first index of the time dimension for the test

unused imports removed
Merge pull request #507 from munslowa/nimrod_time

Load of nimrod files with multiple fields and period of interest
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.