Many updates. Can now open level 2 cubes and can open any spiceinit'd or...

Many updates. Can now open level 2 cubes and can open any spiceinit'd or projected cube without camstats or footprintinit. cnet tool arrows now toggle-able

git-svn-id: http://subversion.wr.usgs.gov/repos/prog/isis3/trunk@2427 41f8697f-d340-4b68-9986-7bafba869bb8