KidsTimeout

- Make moblist a configurable list. Users can modify the config.yml to specify the entities.
- Print a console message when a player kills a friendly entity.

- players logging out while in timeout are stuck and need to teleport out manually.
- there is no in-game way to change the list of entities. The default config.yml lists the most useful ones and corresponds with the old builtin list.
- the name in the entity list must be the exact bukkit entity name (e.g. VillagerGolem)