Geo query polygons (#56)

* allow declustering, update council page (#48)

* option to disable clustering

* update wins, add videos, clean up council page

* improve grouping toggle

* some cleanup

* add polygon from geo query

* use leaflet geo json type

* store geo shape in url

* improve malformed url handling. update nominatim client request

* update readme for java version

* use the query text in the url instead of encoded json

* fix url persistence, toggle boundaries

* style changes

* update prefs on new search

---------

Co-authored-by: Will Freeman <hohosanta@me.com>

shotgun/src/main/scala/services/NominatimClient.scala

@@ -31,7 +31,7 @@ class NominatimClient(implicit val system: ActorSystem, implicit val executionCo
       case _ =>
         println(s"Cache miss for $query")
         val request = HttpRequest(
-          uri = s"$baseUrl?q=$query&format=json",
+          uri = s"$baseUrl?q=$query&polygon_geojson=1&format=json",
           headers = List(headers.`User-Agent`("DeFlock/1.0"))
         )