A simple message 'logger'
LogStream
A PrintStream that redirects the System.out and/or System.err to itself.
Optionally: Write stream out to file.
LogBook & LogBookStream
Class LogBook is a JPanel that shows messages the progam emits during execution.
LogBookStream redirects the System.out stream to a LogBook panel.
Package : uk.co.mmscomputing.util.log