Added UndoAll, RedoAll actions.
This interface may change.
Please test and don't hesitate to send me your comments/suggestions.

Parker Coates proposed to also include player like "play" and "pause" actions to start/stop constantly redoing moves in redo list - one after another.
What do you think about this?
How often would you use such functionality rather than manually pressing "redo"?

P.S. To much buzz for nothing? ;-)