Make a Shiny app or manipulate function for experimenting with model configuration

[seananderson]

• would be helpful for us
• a Shiny app could also potentially be used by others to upload their data and fit
• would likely use the MAP estimate with MVN sampling for speed
• manipulate: https://cran.r-project.org/web/packages/manipulate/index.html
• if a Shiny app, a fancy option would be to return the R code for the function call