Move extendLine() method to LineUtilities.
Move extendLine() method to LineUtilities.
GitoMat/jfreechart,simon04/jfreechart,jfree/jfreechart,simon04/jfreechart,GitoMat/jfreechart,jfree/jfreechart,jfree/jfreechart,simon04/jfreechart,jfree/jfreechart,GitoMat/jfreechart,simon04/jfreechart,GitoMat/jfreechart