Add faction-specific ammo boxes and med boxes

[Veekay45]

1. All ammo boxes have been American since the game’s beginning.
   

   
   
   
   Please add models/textures/text for the other 3 factions.

2. All med boxes have been German since they were added in Stalingrad update.
   

   
   
   
   Please add models/textures/text for the other 3 factions.

Cheers.

[Kriegerfaust007]

yes please