0.3.3.1 - BRRRT

After a very annoying week, here's a little weapon-related update while I work on the firing range:

• Added a laser pointer to the SMG; activated with the front grip like with the Carbine and Plasma Rifle
  
• Both HMG and Minigun now have to be two-handed if you want to properly use them: if you shoot them one-handed they will fly out of your hand
  
• Very, very slightly increased minigun rate of fire
  
• Changed the minigun firing sound to a more BRRT-y one