How to add a shutdown tile to the start screen?

How do I add a tile on the Windows 8 Modern UI that allows me to click that tile to start shutting down the computer?

Adapted from Ben Oostdam's blog.

1. Go to %Appdata%\Microsoft\Windows\Start Menu\Programs
2. Right click > New > Shortcut
3. Enter %windir%\system32\Shutdown.exe -s -t 0 as the location
4. Give it a name and click Finish
5. Position the icon where you want it:
   

Optional:

1. Right click on the shortcut and select Properties
2. Click the Change Icon... button. (There is a power button icon in %SystemRoot%\system32\SHELL32.dll

To add the shortcut to the All Apps group:

1. In the shortcut properties, go to the Security tab
2. Add All Application Packages and make sure the Read and Read & execute permissions are enabled

Use Win+C and then select Shutdown.