Repeat MCMC for cell 5, check we get the same result

[MichaelClerx]

See also #14 and Aidan's work

[MichaelClerx]

• [x] Get same simulation result
• [x] Get same likelihood at same position
• [x] Get same position with cmaes
• [x] Get same position with mcmc

[mirams]

Be good to see overlaid marginal histograms for each parameter under pints and compared with github data.