AVATAR simulator :update on main engine + partial management of time

src/avatartranslator/AvatarActionOnSignal.java

src/avatartranslator/AvatarExpireTimer.java

src/avatartranslator/AvatarRandom.java

src/avatartranslator/AvatarResetTimer.java

src/avatartranslator/AvatarSetTimer.java

src/avatartranslator/AvatarSpecification.java

src/avatartranslator/AvatarStartState.java

src/avatartranslator/AvatarState.java

src/avatartranslator/AvatarStateMachineElement.java

src/avatartranslator/AvatarStopState.java

src/avatartranslator/AvatarTransition.java

...ctsimulation/AvatarSimulationAsynchronousTransaction.java

...tartranslator/directsimulation/AvatarSimulationBlock.java

.../directsimulation/AvatarSimulationPendingTransaction.java

...nslator/directsimulation/AvatarSimulationTransaction.java

...lator/directsimulation/AvatarSpecificationSimulation.java

src/ui/MainGUI.java

src/ui/TGComponent.java

...eractivesimulation/JFrameAvatarInteractiveSimulation.java