Example sources in the examples dir

examples/lazy-source.html

@@ -0,0 +1,20 @@
+---
+template: example.html
+title: Lazy Source
+shortdesc: Example of setting a layer source after construction.
+docs: >
+  <p>Typically, the source for a layer is provided to the layer constructor.
+  If you need to set a layer source after construction, this can be
+  done with the <code>layer.setSource()</code> method.</p>
+  <p>The layer in the map above is constructed with no source.  Use the
+  links below to set/unset the layer source.  A layer is not rendered
+  until its source is set.</p>
+tags: "source"
+---
+<div class="row-fluid">
+  <div class="span12">
+    <div id="map" class="map"></div>
+  </div>
+</div>
+<button id="set-source" class="code">layer.setSource(source)</button>
+<button id="unset-source" class="code">layer.setSource(null)</button>