Upgraded JUnit and Mockito.
Removed some unused method.
Using the same test code for factory methods in AutoDisplayState as for their respective implementation.
Made the specification of ListenerRef weaker. The current specification demanded too much and was not always respected.
Added some untested Swing property implementations.
Added tests for StandardBasedSwingPropertySource.
Added a null check to SwingBasedPropertySource.
Added tests for SwingBasedPropertySource.
Removed empty line from the beginning of SwingBasedPropertySource.
Added tests for SwingProperties.
Removed unused imports from BoolProperties.
Documented SwingPropertySource.
Documented SwingForwarderFactory.
Documented SwingProperties.
Added an untested and undocumented implementation of ComponentPropertySource.