Points now owned and deleted by the network. Network now stored in such a way...

Points now owned and deleted by the network.  Network now stored in such a way than access to all points in a cube is just as cheap as accessing measures in a point.  Removed redundant methods and made other api changes.

git-svn-id: http://subversion.wr.usgs.gov/repos/prog/isis3/trunk@1516 41f8697f-d340-4b68-9986-7bafba869bb8