[Feature] Science loot crate with high tier medicine

[aft2001]

Adds a second medium-tier science loot crate alongside the existing bear-in-a-crate. The crate contains one of each of the following items:

• Salbutamol Reserve Tank
  
• Omnizine Reserve Tank
  
• Atropine Reserve Tank
  
• Pentetic Acid Reserve Tank
  
• Morphine Reserve Tank
  
• Hypospray
  

Currently untested as I am unable to run BYOND at this time. 

Reserve tank addition: https://github.com/goonstation/goonstati...6/pull/112

Loot crate addition: https://github.com/goonstation/goonstati...6/pull/113