Delayed listener#91

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pictavien wants to merge 3 commits intojbotsim:developfrom

pictavien:feature/delayed-listener

Commits on Apr 22, 2020

chg: add a FilteredClockListener that trigger an existing ClockListener at times defined by a method
pictavien
committed
chg: add a PeriodicClockListener that trigger a ClockListener at periodic times
pictavien
committed
chg: replace countdown table with PeriodicClockListeners.
pictavien
committed