Hi @cekees ,

We are having out bi-annual dev meeting this week.  Monday and Tuesday the widget framework was reviewed by the team.  I've been working as fast as possible to get all of the changes committed and working.  I just rebased onto master and finished the changes (~5min ago).  I'm going to run through the example notebooks and update them (they are out of date at the moment).  I'll ping you when they are updated.

Sorry for the inconvenience, but on the bright side, this will be merged into master for 2.0 :)

-Jon