Using the test1.js as a model now have a map where each census tract is clickable and a population density and acreage will be displayed.  Next make the tract be highlighted when clicked.
Trying out forEachProperty from http://stackoverflow.com/questions/24144782/example-of-using-feature-foreachproperty-in-google-maps-javascript-v3 - probably don't actually want to use every property though.
Now have highlighting when a feature is clicked.