Step 8.6: Display incompleteCount in the header.

App.jsx

@@ -65,7 +65,7 @@ App = React.createClass({
     return (
       <div className="container">
         <header>
-          <h1>Todo list</h1>
+          <h1>Todo list ({this.data.incompleteCount})</h1>
 
           <label className="hide-completed">
             <input type="checkbox" readOnly={true}