Rename inference sampling?

[MichaelClerx]

1. Yes
2. No
3. Don't care

Will mostly be in documentation I think, probably not in the API much

[mirams]

I see sampling as one bit of inference (inference also including the process of using data, prior to assemble the distribution we want to sample from).

[ben18785]

The trouble with inference as a name, for me, is that you could also think of optimisation as a type of inference. You infer the best fit parameters in optimisation (albeit without uncertainty quantification).

[MichaelClerx]

Changed this in the examples & docs