Add more notebook datasets, test depth=16

[RAMitchell]

Implements #38

[RAMitchell]

I'd rather not extract them at the moment but keep it a self contained example. The notebook is not that large as loading each dataset is only a few lines.

I guess thats the problem with notebooks in general, but I still think its worth checking in even if it might go out of date. Agree with removing the verbosity output.