[Image-SIG] More support for McIDAS format

[W.T. Bridgman]

I've modified the McIdasImagePlugin.py to give a little more support 
for DIR & NAV (Mercator projection) data blocks.

How do I go about getting this into the next PIL release?

Tom
--
Dr. William T."Tom" Bridgman               Scientific Visualization 
Studio
Global Science & Technology, Inc.          NASA/Goddard Space Flight 
Center
Email: William.T.Bridgman.1 at gsfc.nasa.gov  Code 935
Phone: 301-286-1346                        Greenbelt, MD 20771
FAX:   301-286-1634                        http://svs.gsfc.nasa.gov/