Fixed support in ckwriter for MESSENGER MDIS images by properly computing...

Fixed support in ckwriter for MESSENGER MDIS images by properly computing rotations/transformations of dynamic kernels in the frame hierarchy; added app tests for MESSENGER and THEMIS instruments; updated documentation.  Fixes #1663.

git-svn-id: http://subversion.wr.usgs.gov/repos/prog/isis3/trunk@5306 41f8697f-d340-4b68-9986-7bafba869bb8