Revision history for ProgressMonitor

0.01    2006-11-27
        First version.

0.02	2007-03-20
		Added the setMessage method and associated configuration options for
		the various monitors.

0.03	2007-03-21
        Minor fixes to adjust the tar building (my gnuwin32 tar creates weird
        permissions in the archive).

0.04	2007-03-23
		Replaced wipeAtEnd with atEndStrategy
		Clear any message when ending

0.05	2007-03-27
		Made the Null monitor a singleton
		Made passMessageToParent default to 0 and parentTicks to 1
		Made it allowable to skip calling prepare() and go directly to begin()
		The messageFiller can be blank/undef, causing partial overlay
		Minor help text changes
		messageStart/EndOverlayFields are now 1 based indices.

0.06	2007-04-05
		- Fixed a loophole; if maxwidth not set we must fall back to hardcoded
		  79 unless the Term::Size... stuff returns something worthwhile
		- Added a convenience subMonitor method to the interface; makes it
		  cleaner to instantiate a SubTask monitor
		- Added a setErrorMessage method and associated support
		- Fixed bug where the Bar never indicated empty progress when it was
		  blank
		- Mumbo jumbo with getting stuff printed right when backspacing 
		  before or after - 'backspaceAfterRender'
		  
0.07	2007-04-11
		- Added a clone method to progressmonitors
		- made sure error messages are cleaned from ws
		- set[Error]Message msgs are no longer mangled, but passed right through
		- a msg is passed through as-is if messageStrategy is newline (message filler applied though...should it?)
		
0.08	2007-04-23
		- It's possible to call 'end' directly if no work is needed at all
		  This signals 'completion' of the monitor.
		- Avoid treating a 'begin(0)' the same as 'begin()'
		- Division by zero in some fields when totalTicks is explicitly '0'.