new in 0.7
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 * record input selector in menu

new in 0.6
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 * options and rc code added
 * options for sampfreq, sampnr, audiodevice, windowsize, trigger
 * adaptive sample scaling in osziview
 * bugfix '4' in lcdview had upper horizotal bar set
 * full schmidt trigger before actual freq measurement
 * going from pos level1 trigger to neg level2 trigger
 * S16 support for better resolution (even on small signals)

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
 * About-Box

new in 0.4
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 * trigger defaults to 0.6
 * pointer in logview better visible
 * update of logview when scale changed in menu
 * "text_width" replaced by "string_width"
