Fixed error handling of missing <event> tag in LogEntry.fromXML().
Implemented MouseEvent.fromXML() method.
Removed debug statement from MouseEvent.fromXML().
Fixed bug in MouseEvent.fromXML().
Implemented MouseClickedEvent.fromXML().
Implemented MouseDraggedEvent.fromXML().
Updated CHANGES.pod.
Implemented MousePressedEvent.fromXML() and MouseReleasedEvent.fromXML().
Implemented MouseWheelMovedEvent.fromXML().
Removed some dead code in CompositeDataLogger class.
Changed rate at which CompositeDataLogger flushes xml log file contents.
Implemented functionality to do so.
Updated TODO list.