- Adding new rendered graph, hierarchy, surface, tree area representations.
   These classes consolidate code that were in several different views.

 - Adding vtkHierarchicalGraphPipeline, which renders bundled graph edges
   on top of a tree. This is a convenience class used by
   vtkRenderedHierarchyRepresentation and vtkRenderedTreeAreaRepresentation.

 - Fixing up OverView geo views and hierarchy view.

 - Removing buggy hack in vtkScalarsToColors that caused problems with
   correctly rendering color arrays.

 - Added opacity to annotations.

 - vtkGraph now creates edge points on demand instead of throwing errors,
   and correctly deep copies edge points on force ownership call.

 - Updating geovis tests to use new graph representation API.

 - Moved vtkGeoEdgeStrategy to Infovis so it can be accessed in the graph
   representation.

 - Moved vtkGeoMath to Infovis since it is used by vtkGeoEdgeStrategy.

 - Removed vtkGeoGraphRepresentation and vtkGeo...