GDAL netcdf convention CF support

GDAL now supports netcdf format using CF convention as specified by unidata.

http://www.unidata.ucar.edu/software/netcdf/conventions.hdf

The software looks if the variables lat/latitude and lon/longitude are presents 
in the netcdf file. If found, these variables are used to specify the 
georeferencing transformation.

I'd like the community to try it out and if there are some problems, let me 
know. GDAL netcdf format also works on Windows with he precompile library 
version 3.6.1-beta1 (January 2005).

Regards,
Denis Nadeau