Absolute Heckin' Quacker

Stuff ported from 1.7:
https://github.com/HbmMods/Hbm-s-Nuclear-Tech-GIT/releases/tag/1.0.27X3640
https://github.com/HbmMods/Hbm-s-Nuclear-Tech-GIT/releases/tag/1.0.27X3633
https://github.com/HbmMods/Hbm-s-Nuclear-Tech-GIT/releases/tag/1.0.27X3626

New doors! Come in two variants, one with a keypad and one with a window.
Vortex sniper rifle has a cool firing effect.
More particle effects optionally use the instanced particle renderer, meteors should be far less laggy on some computers now.

Fixed some bugs and crashes and stuff, too.

UPDATE: Fixed ducking mechanic not working when 0, 0, 0 is unloaded.