Merge pull request #316 from pelson/extest_simplification

Updated the extests to easily support image tolerances.
extest_remove_unused_import
Merge pull request #326 from iedwards/extest_remove_unused_import

Unused "import unittest" removed from extests
wip, save not working
save working
results change
missing result
review action
removed api patch awareness
added switch
restored patch awareness
review actions
review action
review action
review action
Merge pull request #174 from bblay/grib_negft

Grib hindcast workaround
Remove obsolete dead code
Merge pull request #333 from rhattersley/del-long-name

Remove obsolete unused code (very small)
Prevented the ability to add AuxCoord instances to the dim_coords.