Initial checkin for netcdf and Atmospheric classes.
Added logo to README.html
Added colormap utilities, xunit external libraries.
Updated Readme to point to wiki, added external libs to setup script.
Support product identification, including NAM.
Initial unit tests for Atmspheric class.
Ignoring Matlab temp files .m~ and .asv
File-type determined from Netcdf GlobalAttributes().
Improved dynamic field loading for hybrid vs. isobaric files.
Improved variable-naming robustness, several bug fixes for plotting, improved date extraction.
Updated default visualization layers.