create_posterior: Simplify posterior call
In jameshay218/zikaProj: zikaInfer

Simplifies the call to the posterior function using closures. This function is set up to work with the lazymcmc package, found at github.com/jameshay218/lazymcmc

1	create_posterior(parTab, data, PRIOR_FUNC, ...)

`parTab`	the parameter table. See `exampleParTab`
`data`	the microcephaly data. See `exampleMicroDat`
`PRIOR_FUNC`	pointer to a function to calculate prior values. Can take "pars" and "..." as arguments, where "pars" is the model parameters.
`incDat`	should also include incidence data, though this can be left as NULL. See `exampleIncDat`.
`peakTimes`	include data on epidemic peak time ranges. Can be left as NULL. See `examplePeakTimes`
`ts`	time vector over which to solve the ODE model
`version`	usually just leave this as "binomial", indicating assumed binomially distributed errors. I've added a "forecast" version which expects parameters to do with the lack of second wave.