Added mobservable / mobservable-react to the project

app/app.tsx

@@ -1,6 +1,8 @@
 /// <reference path="../typings/react/react.d.ts" />
 
 import React = require('react');
+import {observable} from 'mobservable';
+import {observer} from 'mobservable-react';
 
 class DemoProps {
   public name: string;
@@ -12,11 +14,30 @@ class Demo extends React.Component<DemoProps, any> {
   }
   render() {
     return (
-      <div>Hello {this.props.name}!</div>
+      <div>
+        <div>Hello {this.props.name}!</div>
+        <Timer/>
+      </div>
     );
   }
 }
 
+
+var timerState = observable({
+  secondsPassed: 0
+});
+
+setInterval(() => timerState.secondsPassed++, 1000);
+
+@observer
+class Timer extends React.Component<{}, {}> {
+  render() {
+    return (
+      <span>Seconds passed: {timerState.secondsPassed}</span>
+    )
+  }
+}
+
 function render() {
   React.render(
     <Demo name="World" />,