Metal Detector

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version 1.31 - Small update to use Google Play Services.

version 1.30 - Added changing pitch sound like a real metal detector (will not work on Android 4.3 but will work on 4.3.1)

version 1.20 - Bug fixes for newer phones and tablets and updated the instructions.

version 1.10 - Buttons and instruction text now displayed correctly for very high density screen devices.

version 1.01 - Small bug fix when restarting the app.