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.
I see and I presumed so, because first IPython is loaded and then you attach an event handler, which shouldn't work, unless there is some mechanism that would store information about an action (I don't want to use word event here) that happened and attaching a new handler would call it immediately.