ENH: Merge changes from main tree into VTK-5-0 branch. (cvs -q up -j1.45 -j1.46 Common/vtkCommand.cxx) (cvs -q up -j1.65 -j1.66 Common/vtkCommand.h) (copies of Common/vtkObject.cxx r1.102, Common/vtkObject.h r1.102 and Rendering/vtkInteractorEventRecorder.cxx r1.14) then removed references to the interactor's HandleEventLoop member since it does not exist in VTK-5-0