Added some initial GUI tests for qview and qnet. This includes the qnet...

Added some initial GUI tests for qview and qnet. This includes the qnet tool/geoming points, the qview cube displays, the qview stats tool, the qview nomenclature tool, and interactions with qview tools when no cubes are open. Fixes #916.

git-svn-id: http://subversion.wr.usgs.gov/repos/prog/isis3/trunk@4683 41f8697f-d340-4b68-9986-7bafba869bb8