Population demo doesn't match source code

[hinkelman]

https://github.com/jcheng5/leaflet-shiny/tree/master/inst/examples/population

doesn't match

http://glimmer.rstudio.com/jcheng/leaflet-demo/

Namely, the code for the 'random location' and 'add marker on click' is not included.

[hinkelman]

I just realized that the code that seems to match the population demo is found in the polygon-example branch:

https://github.com/jcheng5/leaflet-shiny/tree/polygon-example/inst/example