1.2.0
	new improved internal plot structure
	parser support for functions with more parameters
	new surface plot with contour support and legend
	support for jpeg2000 and tiff
	user guide (KDE handbook)
	even more buxfixes
	      
1.1.1
 	matrix-data-reading
 	density plots from function and data
        parser completly rewritten
	colored and scaled printing
	export plot as graphics
	more flexible data reading
	improved axis tics label (format and position)
	more bugfixes
