Refs #6342. First attempt at using new view.

Gutted original view code to use new plugin. It currently does not work and
there is lots of debugging code left behind.
Refs #6347. Initial cut at using new view.

This was incredibly easy to get going. Need to do lots of clean up and then
hook up the slice viewer.
Refs #6347. Massive amount of code removal.
Refs #6347. Starting hook up of SliceViewer.
Refs #6347. Progress on SliceView showing.
Refs #6342. View now working.
Refs #6347. SliceViewer now works.
Merge branch '6347_vsi_multisliceview' into merge_new_views

Refs #6347. Fixing merge conflict on ViewBase