remove .btn-group

The example doesn't use .btn-group and adding the class causes "bad things to happen," as the saying goes.

http://jsfiddle.net/josephtate/g6AWF

components.html

@@ -1163,7 +1163,7 @@ base_url: "../"
 
 <div class="input-group">
   <input type="text" class="form-control">
-  <div class="input-group-btn btn-group">
+  <div class="input-group-btn">
     <!-- Button and dropdown menu -->
   </div>
 </div>