first cut
Ok right dir structure
working version of the standard AMWG test script.  needs the rest of AMWG (unchanged),
including cam5 and obs data.
The beginnings of code to find the data files the user wants: simple sample classes for finding datafiles (in this case,
everything below a root directory) and for filtering files.
New file for defining, building, and indexing a file table.
When drawing plots, you will look in the file table to see which
files have the data you need.
At this point this file isn't finished, but there's enough code in it
to show what my thoughts are.
a few more filter classes
oops - already there's a bug!  An index value should be a list of rows, not
a row, as index[file] or index[variable] is far from unique!
still not tested, but this is a nearly-complete simple first cut at
the file table building code
finished.  This is ready to test when uvcdat is available.
changed path to python in first line
Miscellaneous code and comments, for playing around with ideas
for how to code things.  It's repetitive sometimes.
Towards the end I'm starting to firm up some ideas about how
to structure higher-level parts of the AMWG "clone".
first line chooses a python good on oceanonly.llnl.gov
minor bug fixes, minor indentation changes, lots of printing supported by new
__repr__ methods, sort method in basic_filetable, added a couple more
variables to the list of interesting standard_names.
converging on a sensible design, not quite there
better class name
Initial files commits
Removing amwg code
Testing GIT COMMIT
Merge branch 'master' of github.com:UV-CDAT/wgne-wgcm_metrics
PG mv calculate_metrics.py to metrics_driver.py and created module metrics_calculations.py.  Code currently runs to finish.