cneteditor.xml: Added documentation in preparation for the October release....

cneteditor.xml: Added documentation in preparation for the October release. Credit goes to Janet Richie and Ella Lee for their help in preparing the documentation. 

git-svn-id: http://subversion.wr.usgs.gov/repos/prog/isis3/trunk@3526 41f8697f-d340-4b68-9986-7bafba869bb8