More idiomatic project setup

app/app.tsx

@@ -1,49 +0,0 @@
-/// <reference path="../typings/tsd.d.ts" />
-
-import React = require('react');
-import ReactDOM = require('react-dom');
-import {observable} from 'mobservable';
-import {observer} from 'mobservable-react';
-
-class DemoProps {
-  public name: string;
-}
-
-class Demo extends React.Component<DemoProps, any> {
-  constructor(props: DemoProps) {
-    super(props);
-  }
-  render() {
-    return (
-      <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() {
-  ReactDOM.render(
-    <Demo name="World" />,
-    document.getElementById('app')
-  );
-}
-
-render();