Update 1.8 (v0.20)

tweaked display case
wheel_armor as vp_wheel_armor
tweaked vp_saddle, vp_horn, vp_frame_handle
new torch, torch_done, torch_lit
antifungal
antiparasitic
new ppsh
new fn57
new fn_fal
resized m79
new m202_flash
redid mon_zombie_gasbag