First working version of automated execution of notebooks in example folder.

Very WIP... I will work more on this in the next days...

Edit: No longer a WIP.
The custom profile is the canonical way to inject js into the notebook... I tested some things using `test.js` but did not work... but I have to say I did not test the current event `status_started.Kernel` there... maybe I can do a test to see if it is working now... I will try it and let you know...