find_files, more reasonable behavior when ranges aren't provided
fix small bugs
Formerly plan_computation for plot_set4 assumed that model had hybrid levels and obs had pressure
levels.  Now either one can have either kind of levels.
comments changed
the usual minor changes; and improved polling in the test of plotdata_status
git.py is automatically generated, shouldn't be controlled
Merge commit 'a1546098453f7c042ce5371f00302ed90d59de80' into devel
Merge commit '01fa77396b57f206118a1d68ad73657a4de38bb8' into devel
revise plot set names as Brian did.  Brian's other changes were temporary debugging printouts.
Merge remote-tracking branch 'origin/devel' into devel

Conflicts:
	src/python/packages/amwg/amwg.py
git.py is automatically generated, shouldn't be kept in the repository
Identify level axis with isLevel(), not its name.  More changes of this sort should be made. Also corrected some typos.
another change where axis is identified by isLevel(), etc. not by name 'lev', etc.
improved diagnostic output
build seems to work better without uvcdat in __init__
Convert to use the Options class; and the usual minor testing changes.