14196: Allow unicode path in vtkLoadPythonTkWidgets.py.

Change-Id: I294825c2de6d2cdc5854116f12227f25ed88abaa
Ensure libproj4 defaults to use pthreads if VTK does

Change-Id: I401d622e28e62d78ed850c36f5270a682f08a2c0
Merge topic '14196_pytkwidget-allow-unicode' into master

a162be1f 14196: Allow unicode path in vtkLoadPythonTkWidgets.py.
Merge topic 'proj4-pthreads' into master

c68b549e Ensure libproj4 defaults to use pthreads if VTK does