Snotgobbler/doc

• Snotgobblers are mini grabber zeds that explode like a boomer when killed.
• Look at that poor thing, it only wants a hug. Why would you harm it?
• Killing snotgobblers will inflict a morale penalty, so killing lots of them at once is not recommended. If you do not care about loot, lure them into a building and burn it down, killing the zombies inside without any morale penalty. Alternatively, running over them with a vehicle also works. The Psychopath trait also gets rid of the morale penalty.
• Eventually if you kill enough of them (100) the penalty goes away. And the penalty slowly reduces in number the more you kill
• Has a grab attack.
• Added in 0.D (Danny).