The MESSENGER MDIS camera model has been changed to create an instrument...

The MESSENGER MDIS camera model has been changed to create an instrument neutral temperature dependent focal length keyword (TempDependentFocalLength) in the NaifKeywords group to store this value for easy access.  Incremented camera version number to 2. Removed backword compatibility code supporting older IKs.  The first valid IK  with this version is msgr_mdis_v131.ti. Updated the IK, FK (msgr_v220.tf) and PCK (pck00010_MSGR_v10.tpc) NAIF kernels. Note that spiceinit will be required to be run on all MDIS images resulting from these changes.  Fixes #1214. 


git-svn-id: http://subversion.wr.usgs.gov/repos/prog/isis3/trunk@4798 41f8697f-d340-4b68-9986-7bafba869bb8