-Added inverted twin missile silos
-Added marine twin missile silos

-adjusted hitbox of marine missile silos
-adjust upgrade cost of HE missile silo 275m -> 225m

Fixed SFX volume slider being broken.

Added kinetic beam support for birdies ammo.

buff barrel cannon a bit. (devices can spawn on all slope angles. slightly less cost. more projectile hp)

fixed crash with buster commander

fixed dynamicbarrel slow upgrading time issue with fortships.

removed unneeded logging.

kinetic beam now disabled in high seas water maps. (pushes boats out of the buildable zone.)

updated strings to match new forts string update.

Also this is update 69. nice.

Half firebird flaming fog damage.

support for dlc2 underwater effects.

balance: hanging drone costs more to build, 5 more seconds to build, and 3 more seconds to reload. Bombs drop with 981 gravity instead of 400. metal fire cost += 10

blance: swarm shield reload decreased by 2 seconds, fire energy cost increased to 800 energy.

improve: hardpoint0 positions of some weapons were off center.
improve: single use incendiary rocket gains the napalm effect.
improve: napalm effect was delayed.