Notebook unittests

[matthewware]

No description provided.

[matthewware]

If there are no objections(?), I'll do the honors.

[grahamrow]

Good idea. These are digested by the documentation system, so we need to fix doc/qubits.rst to point to these new files.

[matthewware]

So the calibration notebook needs an sql database file to run. I'll create one but maybe @grahamrow or @gribeill you have the one used to make the example notebooks?

[matthewware]

So actually executing the code in the notebooks may not be the best idea without hardware. Maybe that's obvious in hindsight. Might need to generate fake data from the spectrum analyzer.