Update coincident geomtry support

Add in support for specifying different offsets for surfaces lines and points. This includes being able to specify both global offsets as before and instance offsets. Changed the defaults to have polygon offsets be 2,2 lines 1,1 and points be 0.

Update some examples to remove the specified polydata offset value as the defaults are better and making polygons 1,1 ends up setting them the same as lines.

Update a valid image or two due to lighting changes that were squeaking by previously.

Add a test that has points lines and surfaces all drawn on top of each other.