Update documentation to include search parameter

Update the documentation to add the search parameter, which was missing.

This should not be buried in the source code, since this is a really useful function.

index.html

@@ -1758,7 +1758,12 @@ $("#select").select2({
     <p>Notifies Select2 that a drag and drop sorting operation has finished. Select2 will re-display any elements previously hidden and update the selection of the element it is attached to.
         Example: <code>$("#tags").select2("onSortEnd");</code>
     </p>
-
+  <div class="row">
+        <div class="span12"><h3>search</h3></div>
+    </div>
+    <p>Executes a new search using the provided value.
+        Example: <code>$("#tags").select2("search","California");</code>
+    </p>
 
         <div class="row">
           <div class="span12"><h2>Events</h2></div>