new CubeList method to extract over common coord values
BLD: Upddated INSTALL for build and runtime deps.
Changed to generator comprehension
Default NetCDF dimensionless unit.
GRIB deferred loading with Biggus.
Review actions.
Simplify circularity test in nc load rules.
Define circularity from bounds, if any.
Added tests for old+new circular logic.
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.