In cubeit, fixed handling of band specifications in the list file. The band...

In cubeit, fixed handling of band specifications in the list file. The band bin group is still incorrect, but the correct bands are now placed in the output cube. Fixes #964.

git-svn-id: http://subversion.wr.usgs.gov/repos/prog/isis3/trunk@4969 41f8697f-d340-4b68-9986-7bafba869bb8