Enhancement of Survival Analysis documentation

[springcoil]

Just a quick remark/ placeholder.

Would it be possible to stick #1870 in a notebook, with the examples of survival analysis/ censoring like @fonnesbeck has done in the past.

[twiecki]

CC @domenzain

[domenzain]

Oh, the notebooks in the docs look neat.
Is there a particularly good one to emulate?

[springcoil]

https://docs.pymc.io/notebooks/rugby_analytics.html is a decent one (disclosure: I am the author) https://docs.pymc.io/notebooks/stochastic_volatility.html -- Stochastic Volatility is a good one too.