Put the "can't recognize file" message in a better place.
Polishing and minor corrections, and added a line to write the table (AMWG plot set 1).
Get outputdir from the correctly named option.
Add ignore_alpha when writing a png file.  This makes sure that lettering is over an opaque
background.  There's no use to the default, where lettering is made by turning transparency
on or off in the alpha channel.
Charles says he'll change the default tomorrow, so this change is almost pointless.
added json file with Dean templates, loaded when importing package
Merge branch 'devel' of github.com:UV-CDAT/uvcmetrics into devel
A couple imports were still needed to support Charles' changes to how templates are set up.
Add metadiags.py script.
Also:
Some fairly minor usability changes -- realms now have a coords and filekey. added --xml option (primarily used in diags.py). added --outputpre/--outputpost options for tweaking filenames
icky hacks for questionable units in obs sets
Add TGCLDLWP->TGCLDLWP_OCEAN to the special vars; also stop printing varlist from amwg set 4
check for available sets vs user requested sets