v0.9.3.1

Fixes:

- re-enabled full Armory Mod

- reverted to previous version of simulation_objects_props which didn't
have all new squads added to it (suspected to cause issues in newer
version)

- fixed crash with non-existant duty_sim_squad_veteran_zat_b40_assault
squad

- 'Controller brain tissue' description works properly now

- made numerous fixes to NPC loadouts to prevent weapons with
non-supported attachements to spawn on NPCs:

* GSH18 with silencer (requires upgrade)
* WALTHER with silencer (requires upgrade)

- fixed upgrade tree for STG44 (modern) so that it uses AK74u scheme as
other variants do

- PMK gasmask should not crash on upgrade attempt any more

- PKM mashine gun should no crash on upgrade attempt and should use the
proper ammo now

- fixed some minor differences between helemet configs between the
classes

Tweaks:

- reduced radiation protection of cloth mask by 50%

- GALIL now uses STG550 upgrade scheme (was using L85 previously)

- this time really implemented revised descriptions for all weapon
attachements and properly assingned them in item configs