Orthographic.h: 2011-01-31 Steven Lambright - Improved ability to work with...

Orthographic.h: 2011-01-31 Steven Lambright - Improved ability to work with lat/lon ranges outside of what is possible to project. Now a lat,lon range of -90 to 90, 0 to 360 works. Improved XYRange method to have a better chance at success. 

git-svn-id: http://subversion.wr.usgs.gov/repos/prog/isis3/trunk@1672 41f8697f-d340-4b68-9986-7bafba869bb8