The StayAtTown-behavior now always creates tasks for all heroes to go and stay at a town. It will be treated differently than going to a town for mana in the sense that it is only considered at the lowest priority-tier. So it will only happen when the AI doesn't find anything else to do. It should resolve one of the two main-reasons for losing weak heros.
The hunter-gather-priority-tier now goes strictly by distance for all taks that are considered above 0 in value.
