add READ_EXTERNAL_STORAGE permission

in order to read external storage, READ_EXTERNAL_STORAGE permission is
added
change sample rate to 55466Hz

3.9936MHz / 72 = 55466Hz
change sdkversion to 10

To show “Stop” menu in Android 3 or later, min / target sdk version
should be less than 11
fix s98header parser to read UTF-8 tags properly

should have used explicit type conversion