Needed assets for swirl

[redrumrobot]

• HUD icons for new grenade types
• HUD element for HP reserve status from Biokit use
• Alien .skins for chrysalis armor
• Segmented Tyrant model (head can look around)
• Scorch impact marks / flame effects for flamethrower impact on surfaces
• New models for different grenade types: Incendiary, fragmentation, nade launcher nade
• Lasermine model
• New particles / visual fx for different nade types