Update to market URLs

website/index.html

     <h1 style="background: url('android.png') no-repeat right; padding-top: 50px; margin-top: 0;">Android projects by <span>Chris Smith</span></h1>
     <div>
      <div class="app">
-      <a href="SensorLogger.apk" class="qr"><img src="SensorLogger.png" alt="SensorLogger.apk QR code"></a>
+      <a href="market://details?id=uk.co.md87.android.sensorlogger" class="qr"><img src="SensorLogger.png" alt="SensorLogger.apk QR code"></a>
       <h2>Sensor logger</h2>
       <p>Logs changes in accelerometer and magnetic readings and allows them to be uploaded for use in research.</p>
       <p>When the "start" button is pressed, the application will log sensor data for approximately 50 seconds, and then automatically upload it along with the user-supplied activity description.</p>