Snarks enemy selection rework

[MyGamepedia]

Fixes #300
Replaces teamnum value to make IsValidEnemy() pass players even if mp_teamplay is enabled to make snarks aggressive to all players, just like in sp/dm. Filtered map-placed snarks for certain reasons.
Includes ENTPATCH_BM_SNARK macro.

[MyGamepedia]

okay, this doesn't work somehow, i'll rework it.

[MyGamepedia]

Turns out this needs to be done with a delay.

[ampreeT]

Hey I don't think that implementing snark aggression against players is a good idea as it would be easier to grief (spawn, throw snarks, suicide, repeat). In fact, it may be better for snarks to ignore players/friendly npcs regardless of mp_teamplay and to instead use mp_friendlyfire to dictate snark aggression. @Alienmario wdyt?

[Alienmario]

Yeah, mp_friendlyfire makes sense here.

[MyGamepedia]

Hey I don't think that implementing snark aggression against players is a good idea as it would be easier to grief (spawn, throw snarks, suicide, repeat). In fact, it may be better for snarks to ignore players/friendly npcs regardless of mp_teamplay and to instead use mp_friendlyfire to dictate snark aggression. @Alienmario wdyt?

good idea.

[MyGamepedia]

Hey I don't think that implementing snark aggression against players is a good idea as it would be easier to grief (spawn, throw snarks, suicide, repeat). In fact, it may be better for snarks to ignore players/friendly npcs regardless of mp_teamplay and to instead use mp_friendlyfire to dictate snark aggression. @Alienmario wdyt?

Done in the way as described here. Guard and scientists still aren't happy to see player's snarks, but I guess it's fine ?

[MyGamepedia]

I have working filter for ally NPCs now, the only issue is that they still can ask for help.