Merged m00623 branch into trunk starting at r3780 including r3781, r3836,...

Merged m00623 branch into trunk starting at r3780 including r3781, r3836, r3842 in reference to issue #623

git-svn-id: http://subversion.wr.usgs.gov/repos/prog/isis3/trunk@3846 41f8697f-d340-4b68-9986-7bafba869bb8