new in 0.2
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 * physical and wien tuning now work properly.
 * support for natural tuning

new in 0.3
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 * "key" instead of "base" for key of natural tuning 
 * bugfix: A# instead of Bb for US-Alternate
 * bugfix: Note pointer removed after switching Tuning
 * Device adjustable in .kguitunerc by DSPDeviceName=/dev/...
   (/dev/stdin also possible)
 * bugfix: removed several compiler warnings (errors on some systems)
 * ".kdelnk"-file installs into "Multimedia" insteaed of "Applications"

new in 0.4
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 * trigger defaults to 0.6
 * pointer in logview better visible
 
new in 0.5
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 * sample frequency adjustable up to 48000 Hz (instead of 44000)
 * bugfix for newer OSS, which don't support small fragments
 