version 0.4.1:
  * preliminary XML-Schema definition for plots
  * fixed redraw problem
  * added primitives Line and Symbol
  * code cleanup (moved some classes to a new package)


version 0.4.0:
  * migrated from make to ant
  * redesign of most of the classes


version 0.2.0:
  * relaunsch of plotlib (after two years!)
  * updated makefiles and test-classes
    (the package now compiles without problems)


version 0.12:
	* added class LayoutTest  (package test)
	* added class DefaultRange  (package widgets)
	* added class DatasetTracker  (package plot)
	* added class DatasetListener  (package plot)
	* added class DatasetChangedEvent (package plot)


version 0.11:
  * changed makefiles to create test.jar in addition to plotlib.jar


version 0.1:
  * first public release