BLD: Upddated INSTALL for build and runtime deps.
GRIB deferred loading with Biggus.
Review actions.
Concatenate reporting
Improved error messages on concat failure
Fixed test failure
Improved failure messages
Removed spurious whitespace
Factored coordinate comparing code to separate function
Messages differentiate between coord and metadata differences
pep8 corrections
Added catch for more than one cube being returned by concatenate process
Fixed travis-only test failure
Review actions.
Review actions
Fixed netcdf save bug
Make GDAL tests optional.
Further review actions
deprecated iris.util.ensure_array and removed special 1d array behaviour
test result changes