Workaround for parsing "per kilometer per steradian".
Trac #577 - aggregation grid syntax required updating.
Trac #563 - aggregating Aeronet data requires axis names without spaces.
Trac #374 - handle longitude wraparound for subsetting.
Merge branch 'devel' of proj.badc.rl.ac.uk:jasmin_cis into devel
Trac #374 - Corrections to tests for Subset._fix_longitude_limits and new tests.
Change to aggregator to reflect change in SubsetConstraint.set_limit.
Handle standard name or units set to None when creating GriddedData.
Trac #590 - min and max arguments are somtimes ignored.
Merge remote-tracking branch 'origin/devel' into devel
Trac #490 - raised error now includes sensible message.
Related to Trac #576 and #374 - more changes for colocation where data and sample points are on different longitude ranges.
Trac #493 - ignore case when getting coords for ungridded data.
Trac #493 - better fix such that standard_name is preferred when getting the coordinate name (if otherwise not specified).

Also fix for failing manual plot test.
Safer time axis detection. Also reverted changes in commit a3793f6, which should no longer be required.
Fix for Trac #580, helpful error message thrown when using a wrongly named dimension.
Related to Trac #576 and #374 - following on from commit 564f2f6019 - more changes for colocation where data and sample points are on different longitude ranges.
Merge branch 'devel' of proj.badc.rl.ac.uk:jasmin_cis into devel
Updates to colocation documentation for Trac #463 and #584.
Update to version number for 0.6.6-pre5.