use http, use mvt as transmission format and remove superfluous ?api_…

…key= url parameter (fix #175 hopefully)

app/src/main/assets/cinnabar-style-7.0.0.yaml

@@ -718,12 +718,8 @@ textures:
 
 sources:
     mapzen:
-        type: TopoJSON #GeoJSON, MVT, TopoJSON
-        url:  https://tile.mapzen.com/mapzen/vector/v1/all/{z}/{x}/{y}.topojson
-        #url: '//tile.dev.mapzen.com/mapzen/vector/v1/all/{z}/{x}/{y}.topojson'
-        #url:  //localhost:8080/vector/all/{z}/{x}/{y}.json
-        url_params:
-            api_key: global.sdk_mapzen_api_key
+        type: MVT
+        url:  http://tile.mapzen.com/mapzen/vector/v1/all/{z}/{x}/{y}.mvt
         max_zoom: 16
 
 #    # Only enable this for local debug, should not be enabled for prod (app inserts these at runtime)