added the example text to the google apps auth

auth.html

@@ -75,7 +75,14 @@
       display: block;
       margin: 0 0 7px 0;
     }
-    
+
+    #oauth .subtext {
+      margin-left: 7px;
+      color: #666666;
+      font-family: "Lucida Grande", Verdana, sans-serif;
+      font-size: 12px;
+    }
+
     .controls {
       width: 300px;
     }
@@ -278,6 +285,7 @@
         <input class="boxFlex google" type="hidden" name="end_point_auth_failure" value="/auth.html#oauth_failure">
         <button id='submitbtn' type="submit">submit</button>
       </div>
+      <span class="subtext">ex: yourappdomain.com</span>
     </form>
 
     </div>