Help for MARSRELABEL

PURPOSE:
To update certain Label Groups.  Currently support updating or adding
Coordinate_Systems, Camera_Models and Pointing Models definitions

This is currently a MER and MSL specific program, for coordinate frame updates.
Camera Model and Pointing Model updates are multimission.

The output file will have the same image data as the input, only the label
will be changed.

Only single image input is supported which produces single output file.
If the list of files is given as input, only the first file in the list
will be used for processing, the rest will be descarded.

Optionally, the camera model can be written to a separate file (in the
format used by Todd Litwin's camera model programs).

EXECUTION:

marsrelabel inp=input.img out=output.img -cm -pm


OPERATION:


COGNIZANT PROGRAMMER:  Oleg Pariser

HISTORY:
  2003-10    Oleg Pariser - Initial version
  2020-02-04 Walt Bunch - IDS-7928 - Switched to constant format string, removed unused variables, added test case.
 2020-10-13 rgd	Added support for changing cmod cs and FIXED_NAME
 2021-03-06 rgd	Added cm metadata transfer