Improves support for oneway icons in newer mapbox GL js

With help from mapbox/mapbox-gl-js#1792

src/main/resources/debug-plan/debug.html

@@ -5,14 +5,14 @@
     <title></title>
     <meta name='viewport' content='initial-scale=1,maximum-scale=1,user-scalable=no' />
     <script src="//ajax.googleapis.com/ajax/libs/jquery/2.1.4/jquery.min.js"></script>
-    <script src='//api.tiles.mapbox.com/mapbox-gl-js/v0.11.1/mapbox-gl.js'></script>
+    <script src='//api.tiles.mapbox.com/mapbox-gl-js/v0.12.0/mapbox-gl.js'></script>
     <script src='//cdnjs.cloudflare.com/ajax/libs/dat-gui/0.5.1/dat.gui.min.js'></script>
     <script src="//d3js.org/d3.v3.min.js" charset="utf-8"></script>
     <script src='./scripts/config.js'></script>
     <script src='./scripts/utils.js'></script>
     <script src='./scripts/gui.js'></script>
     <script src='./scripts/debug.js'></script>
-    <link href='//api.tiles.mapbox.com/mapbox-gl-js/v0.11.1/mapbox-gl.css' rel='stylesheet' />
+    <link href='//api.tiles.mapbox.com/mapbox-gl-js/v0.12.0/mapbox-gl.css' rel='stylesheet' />
     <style>
         body { margin:0; padding:0; }
         #map { position:absolute; top:0; bottom:0; width:100%; }

src/main/resources/debug-plan/scripts/config.js

@@ -55,7 +55,8 @@ var mapbox_style = {
         },
         "perm": {
             "type": "geojson",
-            "data": full_url
+            "data": full_url,
+            "maxzoom":22
         }
     },
     "sprite": "oneway",
@@ -131,11 +132,11 @@ var oneway_icons_style = {
             ],
             [
                 17,
-                "oneway-big-mix-large"
+                "oneway-big-mix-small"
             ]
             ]
         },
-        "icon-ignore-placement": false,
+        "icon-ignore-placement": true,
         "symbol-spacing":250,
         "icon-allow-overlap":false,
         "icon-padding":2