independantly.  Added ScreenWindow class which represents a window
  onto a terminal screen.  Each terminal view has one screen window
  associated with it.

  This breaks the original design choice of not having the view know anything
  about the session it was displaying, but I feel that no longer makes 
  sense when there is more than one view on a session.

  Still work-in-progress

* Add methods to support tooltips in filters

* Add start of new history size dialog which I hope is easier to understand.

* Internal renaming for clarity
	ca 	-> Character
	cacol	-> CharacterColor
	CO_XYZ	-> COLOR_SPACE_XYZ
	ca.c	-> ca.character
	ca.r	-> ca.rendition
	ca.f 	-> ca.foregroundColor
	ca.b	-> ca.backgroundColor


svn path=/branches/work/konsole-split-view/; revision=640688