2.17.0 14-Jan-2020 - use QVTKOpenGLNativeWidget (requires VTK 8.2.0 and up) - fix display of menubar on macos in dtkVisualizationViewer - stream tracer widget refactoring - major update to decorators: - fix draw/touch usage - uniform coloring is available for all vector decorators - management of color map can be enhanced especially to include opacity - dtkVisualizationDecoratorScalarIsolines -> dtkVisualizationDecoratorIsocontours - dtkVisualizationDecoratorScalarScalarColormap -> dtkVisualizationDecoratorSurfaceColor - add cmake option to build with VTK git (```DTKVISUALIZATION_USE_UPCOMING_VTK```)