The photomet program's ZEROB0STANDARD parameter name was shortened to ZEROB0ST...

The photomet program's ZEROB0STANDARD parameter name was shortened to ZEROB0ST to prevent the user from needing to resize the GUI each time they opened it because of the long length of the parameter name. The photomet program still accepts both ZEROB0STANDARD and ZEROB0ST to make it backwards compatible with scripts that currently use the longer parameter name. References #453 and fixes #1288. A new parameter, CHNGPAR, was also added to photomet to allow the user to change any of the model-related parameter settings without having to first specify the model name on the command line or in the GUI. Any values that are specified using the CHNGPAR parameter will override changes that are specified in the GUI. Any value specified in the GUI will override values specified in the FROMPVL file. References #453. Fixes #1183.

git-svn-id: http://subversion.wr.usgs.gov/repos/prog/isis3/trunk@4846 41f8697f-d340-4b68-9986-7bafba869bb8