Add example with turf.js

examples/turf.html

@@ -0,0 +1,19 @@
+---
+template: example.html
+title: turf.js Example
+shortdesc: Example on how to use turf.js with OpenLayers 3.
+docs: >
+  Example showing the integration of <a href="http://turfjs.org">turf.js</a>
+  with OpenLayers 3. The turf.js function <code>along</code> is used to
+  display a marker every 200 meters along a street.
+tags: "vector, turfjs, along, distance"
+resources:
+  - https://api.tiles.mapbox.com/mapbox.js/plugins/turf/v2.0.0/turf.min.js
+
+
+---
+<div class="row-fluid">
+  <div class="span12">
+    <div id="map" class="map"></div>
+  </div>
+</div>