Adding a simple zoom control.

This control generates simple zoom in/out links that can be styled with CSS.

examples/zoom.js

@@ -0,0 +1,14 @@
+var map = new OpenLayers.Map({
+    div: "map",
+    layers: [new OpenLayers.Layer.OSM()],
+    controls: [
+        new OpenLayers.Control.Navigation({
+            dragPanOptions: {
+                enableKinetic: true
+            }
+        }),
+        new OpenLayers.Control.Zoom()
+    ],
+    center: [0, 0],
+    zoom: 1
+});