update mapnik-reference - refs mapnik/mapnik-reference#61

Author: Dane Springmeyer

package.json

@@ -38,7 +38,7 @@
   },
   "dependencies": {
     "underscore": "~1.6.0",
-    "mapnik-reference": "~6.0.2",
+    "mapnik-reference": "https://github.com/mapnik/mapnik-reference/tarball/group",
     "optimist": "~0.6.0"
   },
   "devDependencies": {

test/rendering-mss/group.mss

@@ -0,0 +1,15 @@
+#roads-text-ref {
+  [highway = 'motorway'][zoom >= 13] {
+    group-start-column: 1;
+    group-num-columns: 6;
+    group-placement: line;
+    group-spacing: 750;
+    group-min-distance: 30;
+
+    shield/shield-size: 10;
+    shield/shield-fill: #fff;
+    shield/shield-face-name: "Some Font";
+    shield/shield-name: "[ref%]";
+    shield/shield-file: url("symbols/mot_shield[length%].png");
+  }
+}

test/rendering-mss/group.xml

@@ -0,0 +1,12 @@
+<Style name="style" filter-mode="first">
+  <Rule>
+    <MaxScaleDenominator>100000</MaxScaleDenominator>
+    <Filter>([highway] = 'motorway')</Filter>
+    <GroupSymbolizer start-column="1" num-columns="6" placement="line" spacing="750" minimum-distance="30" >
+      <SimpleLayout />
+      <GroupRule>
+        <ShieldSymbolizer size="10" fill="#ffffff" face-name="Some Font" file="symbols/mot_shield[length%].png" ><![CDATA[[ref%]]]></ShieldSymbolizer>
+      </GroupRule>
+    </GroupSymbolizer>
+  </Rule>
+</Style>