Added new columns to the flat file to provide additional information about the...

Added new columns to the flat file to provide additional information about the measures that did or did get registered, which fixes #158.  Also added keyword to Points Pvl Group showing how many total points are in the network, this fixes #149.

git-svn-id: http://subversion.wr.usgs.gov/repos/prog/isis3/trunk@2774 41f8697f-d340-4b68-9986-7bafba869bb8