CD Tray detection

[bimmerlabs]

Currently there's no way to detect if the CD tray is open. Normally this isn't an issue, but it can cause a crash if the game tries to read from the disc.

Includes a really simple sample

Use cases:

• Exit to the multiplayer menu if the tray is open
• Use it to make mutliple-disc games
• Be mean to your player and make them open the CD tray and press reset to continue ;)

[ReyeMe]

lgtm