Fixes #802 and fixes #844 - New tests were added to test the changes to the...

Fixes #802 and fixes #844 - New tests were added to test the changes to the Camera::GroundAzimuth and Camera::ComputeAzimuth methods

git-svn-id: http://subversion.wr.usgs.gov/repos/prog/isis3/trunk@4496 41f8697f-d340-4b68-9986-7bafba869bb8