Bigger vectors - sometimes too big, but this scaling is sometimes needed to see them at all.
This will need more work once VCS vector graphics becomes more stable.
New file for Dean's function return_templates_graphic_methods.  Initially it is
providing the templates used in diags.py, thereby simplifying the code in
diags.py.  Later this will be used for the UV-CDAT GUI and all other VCS
graphics.
Set up and call return_templates_graphics_methods() in it.py, for all VCS templates.
Other template code is deleted.
print out identifying information each time "diags..." is issued
If there are more than 3 plots, it's a problem that this supports a summary plot containing
only 2 or 3 plots.  This change generates templates anyway, to make it possible to create
a summary plot containing the first 3 of the plots.
Put a try block around the most commonly used vcanvas2.plot line, because I've hit errors
there.  Also, don't try to plot if there's no template for it.  Also, do a better job
of making filenames for plots - '10' should not be the same as '1'.
Don't check on the last template, check on the first template to see whether anything
could have been plotted to vcanvas2.