title: real time collaboration in google colaboratory
body: <p>Looking for a way to enable real time collaboration in a classroom setting while using Google Colaboratory for a IPython NoteBook. I know I can share the notebook, perform some operations etc, but not sure how to see my collaborators contributions in real time. </p>
  
  <p>Halp? </p>
  
  <p>edit 1:
  I imagined a scenario where one student group could input their code for one part of a problem, while a second student group could do the same, and both would be able to see what the other was doing at 1 minute intervals or so. </p>