add some scales
- add default cdrom drive
- add tooltips
add all scrollbars
add adjustments to HScales
 - better description for encoding formats
 - add frame inside expander for wavepack format
add embedded frame inside WavPack frame
fix alignment of the embedded frame
- fix error in description
expande with to widgets, it is wrong,
but we can easily fix it!
- pack extra formats frames inside VBox
add monkey's audio
- fix layout of widgets in tab
- add AAC format