Added equals() and hashCode() to LogEvent implementations.
Added HashUtil utility.
Added equals() and hashCode() to LogEntry.
Fixed broken LogEntry,getParent() and related error in LogEntry.equals().
Added LogEntry unit test.
Minor formatting fix in LogEntryTest.
Updated unit test class list.
Added KeyEvent unit test.
Added MouseClickedEvent unit test.
Fixed MouseClickedEventTest.
Added unit test for MouseDraggedEvent.
Added unit test for MouseMovedEvent.
Added unit test for MousePressedEvent.
Added unit test for MouseReleasedEvent.
Added unit test for MouseWheelMovedEvent.
Added LogEvent implementation unit tests to test suite.
Added CompositeDataLogger unit test.
Added CompositeDataLogger.containsLogger().
Changed CompositeDataLogger to use Assertions utility.
Merge branch 'wip/xmlout' of https://github.com/zscott92/zedlog into wip/xmlout