Added features to campt so that it outputs the look direction of the...

Added features to campt so that it outputs the look direction of the spacecraft in J2000, camera, and body fixed coordinate systems. Fixes #2403.

git-svn-id: http://subversion.wr.usgs.gov/repos/prog/isis3/trunk@6922 41f8697f-d340-4b68-9986-7bafba869bb8