restrict geocomplete to US addresses (for current search customization)

According to online documentation, we can't restrict geocomplete
results to a city, but we can for a country.
remove extra file, use location scope to override search address

Until Autocomplete lets you specify a city scope, lots of other cities
can show up in the drop down, and I often click the wrong city on my
phone.  This change is to ignore the city altogether if already
specified in the location scope.
trying out handlebars for custom infobox + stub for searching by keyword

Trying out handlebars for infobox.  Looks like too much overhead, but
leaving it in right now for discussion.

(I've also added functionality for searching by keyword.  For now it's
commented out until we have the violations in one field.)
Change the listview filter after search
Change listview filter after search
Merge my listview changes