New explotions

Ok the existing explotion is kind of 1987.



We should make some proper explotion sprites I guess.

Also size of ship should matter on the size of the explotion.

To test the 1.6 sec explotion 

Mark a ship then in console: 

```
Game.player:GetCombatTarget():Explode()
```

![image37](https://f.cloud.github.com/assets/2836201/1811938/fe8d5820-6e66-11e3-9dfc-7df4c26ae659.png)