If simulation is interrupted, all progress is lost

[Lobz]

Because of lack of object persistence and because data is never flushed to file, whenever the simulation is interrupted, no data at all is saved. This is a problem since our simulations tend to stall when population grows too big.

[andrechalom]

When saving/loading, make sure that the random seed is preserved to allow for reproducible simulations; check GillesCom vignette