* async load cornerstoneWADOImageLoader chunk
* Lazy initializing of CornerstoneWADIImageLoader - delayed till Viewer creation
* Async loading of react-vtkjs-viewport
* withCornerstone HOC to wrap routes requiring CornerstoneWADOImageLoader initiazation
* removed dead code in comments
* initWeWorkers is no more. Remove al its references.
Co-authored-by: kedar.netelixir <kedar.choudhary@netelixir.com>
Co-authored-by: Danny Brown <danny.ri.brown@gmail.com>