[0.915] Information ingame

A few problems I've noticed in how the game informs the player.

1. When AI destroys outposts or wild improvements the notice doesn't really tell which one was destroyed.

2. When AI uses stacks of armies to destroy outposts, the game acts as if each army destroyed the outpost. (Example: stack of 3 armies destroys an outpost with two improvements around it, game gives 9 notices of destroyed improvements, three times for each. Very confucing.)

3. When AI uses strategic spells against my towns I get no notice of it. (I got hit by an earthquake and there was no notice of it. First noticed that one of my towns was lacking all of its buildings and after a few turns the town was gone.  )