Multivariate Gaussian example

Multi-dimensioanl gaussian example used to test the samplers with analytic likelihoods with known results.

@virginia.demilio I think if just retry the tests this should pass (it was probably due to the outage on Friday). As an example this all looks good to me. My one suggestion is to give the full name of "multidimensional_gaussian".

@paul.easter how will this fit in with your changes?

changed milestone to %Future

added 2 commits

• e835f0b0 - Name changed for gaussian example
• bf68a40a - Deleted old name for gaussian example

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@gregory.ashton sorry for the late reply. I've changed the name of the examples as you suggested, cheers!

unmarked as a Work In Progress

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merged

mentioned in commit c5a2df27