More Weapons!

Hi, I have fixed a bunch of bugs related to the multiplayer as well as added 3 more weapons. I also added a basic reload mechanic to help balance the weapons better. Speaking of, I re-balanced some of the original weapons like making the rifle more powerful and the shotgun have a tighter spread. I changed the player hit box from one capsule shape to a cube shape for the body and a sphere shape for the head, so that head shot detection is more accurate.