Version 0.2
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	- new PPD widget in the form of a tree view
	- added PPD constraint support
	- complete synchronization between tabs (especially PPD tab and the other)
	- changed image tab layout (added gamma correction and removed PS tab)
	- added "lpr" syntax, and reading from stdin
	- added class support : classes are shown with a different icon and are configurable
	  (like printers with no PPD file)
	- fixed some bugs


Version 0.1
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First public release