add section on comparing interventions using Vacamole model

[amanda-minter]

using {scenarios} if appropriate, add example to compare_interventions.Rmd using Vacamole model vaccination versus no vaccination with visualisation of outcome of interest, include uncertainty in parameter values

[avallecam]

now in

tutorials-late/episodes/compare-interventions.Rmd

Lines 268 to 278 in a1a4b7d

	## Comparing scenarios
	*Coming soon*
	## Challenge : Ebola outbreak analysis
	*Coming soon*