Memory leaks fixed.
On deep zoom + time items scrolled out to left + plus small zoom out operations = TimeItems off screen could get get visible at the wrong position due to an optimization to skip length update. Fixed by forcing offscreen timeitems to length zero.
Issue with UserDrawn time items not always showing up on first draw
EditableGridCell added to help out with easier GanttGrid/Tree edit
Bug with clipping of links at gantt bottom fixed
Binding of the TimeItemLinks collection enabled
Problem with StartTime,StopTime binding fixed