CogVM source as per VMMaker.oscog-eem.2813
CogVM source as per VMMaker.oscog-eem.2813

Fix primitiveSoundEnableAEC and simplify primitiveSoundSupportsAEC.
Make the simulator cope with timestamped events.

timfel/squeakvm,timfel/squeakvm,OpenSmalltalk/vm,timfel/squeakvm,OpenSmalltalk/vm,OpenSmalltalk/vm,OpenSmalltalk/vm,OpenSmalltalk/vm,timfel/squeakvm,OpenSmalltalk/vm,timfel/squeakvm,OpenSmalltalk/vm,timfel/squeakvm,timfel/squeakvm,OpenSmalltalk/vm,timfel/squeakvm