Log message

Allow risk charts for regression models.
Add filter on Log export to remap variable names.

	Modify	/trunk/changes.html.in	diff
	Modify	/trunk/src/evaluate.R	diff
	Modify	/trunk/src/log.R	diff
	Modify	/trunk/src/model.R	diff
	Modify	/trunk/src/rattle.R	diff
	Modify	/trunk/src/rattle.glade	diff