#45 Detect unwanted push on village lost

[xtian]

If you have a ResourceSender send resources to one of your villages, and that villages is conquered, the ResourceSender will keep pushing stuff to the enemy and you'll get banned (I did).
We should add a flag to ResourceSender, like ownVillage="true", and the strategy should check that the target village is still ours. If it is not, it should either disable itself or just exit with no action (so that if eventually the village is reconquered, it would restart operations).