Consolidated 'addVertex' methods in Graphics Primitives. Added a 'primitive...

Consolidated 'addVertex' methods in Graphics Primitives.  Added a 'primitive restart' for triangle strips.  Updated border drawing to use newer line drawing.  Renamed primitive types for newer lines to 'polygonal' lines and others that still use OpenGL to have 'OpenGL' in their name.  Also added a 'sphere' primitive that draws a sphere at each vertex.