Added to game: squirrels and ferrets

[+Colibri]

You need ML version of the game in order to see these new animals. Actually, if you have a version lower than ML you see everybody as ogres, so i believe everyone has that.

Added squirrels, they lurk around forrests around skara brae, basically central trammel.
Just working on ferrets, they will be around minoc-covetous area and the forrests north of compassion desert.

There are quite many of them, not a rare animal at all. But it might need you some time to find them, their habitat is quite big.