New filter added (MeasureCountFilter). Users can now filter points by a...

New filter added (MeasureCountFilter).  Users can now filter points by a minimum or maximum number of measures.

git-svn-id: http://subversion.wr.usgs.gov/repos/prog/isis3/trunk@3162 41f8697f-d340-4b68-9986-7bafba869bb8