ERR: Do not use separate debug/optimized linking of python libraries if they are both the same library.

ShearWarpMapper code contributed by Stefan Bruckner, with some fixes and tidying up by Namkug Kim. Many thanks to them both. Lots of problems appear to still exist with this code.

ENH: Moved streams selection code to VTK_SELECT_STREAMS_LIBRARY macro in CMake/vtkSelectStreamsLibrary.cmake.

ENH: Adding vtkWin32ProcessOutputWindow class and supporting vtkWin32OutputWindowProcess executable.  These can be used to have VTK output window messages go to a separate process.  This way users can always seen and interact with message no matter what happens to the original process.