Update README for notebook-render
Update README for notebook-render

rgbkrk/nteract,nteract/nteract,rgbkrk/nteract,nteract/nteract,nteract/nteract,nteract/composition,rgbkrk/nteract,nteract/nteract,nteract/composition,rgbkrk/nteract,nteract/nteract,rgbkrk/nteract,nteract/composition