Fix quests and change how patrolhelicopter and bradley attacker is decided

[maxijonson]

This PR fixes #7 among other quests:

• Fix patrolhelicopter quest not working due to GetComponent<BaseHelicopter>() always returning null
• Fix wolf quests not working because a recent update to the wolf AI changed the entity prefab short name to wolf2 instead of just wolf
• Fix tunnel and underwater lab dweller quests. Their short names needed to be prefixed by npc_.
• Changed bradleyapc's "winner" to behave the same as the patrolhelicopter.
• Changed how the "winner" of patrolhelicopter and bradleyapc is decided. Instead of counting the number of hits, I count the total amount of damage. The player who dealt the most damage gets the quest reward. Side note: it might be interesting to grant it to players who contributed to some extent too.