First React in Subscribers.

assets/js/src/subscribers.jsx

@@ -0,0 +1,15 @@
+define('subscribers', ['react'], function(React) {
+  var CommentBox = React.createClass({
+    render: function() {
+      return (
+          <div className="commentBox">
+          Hello, world! I am a CommentBox.
+          </div>
+          );
+    }
+  });
+  React.render(
+      <CommentBox />,
+      document.getElementById('subscribers-container')
+      );
+});