Update 2.1.0.4 (lobby codes and physics optimization)

Just a small update to add a much requested feature: entering a code to join people's lobbies, instead of having to be friends on Steam. Also did some optimizing on the physics, to allow for more zombies at a time.

Next update I'm hoping to add the Zombie Waves system, along with other stuff that could be considered "new content" (instead of just fixing bugs, and optimizing stuff).

• CHANGES:

. Added joining lobbies by copy/pasting a lobby code (you don't need to be friends on Steam to play together anymore)

. Optimized physics performance when simulating larger quantities of zombies (in preparation to add a zombie waves mechanics)

. Increased amount of zombies that spawn, specially on easy mode . Crosshair doesn't light up red anymore when aiming at zombies or destructible objects

• BUG FIXES:

. Fixed inconsistencies when shooting in third person . Fixed player and Riot Boss being able to shoot through walls . Improved cases were you wouldn't be able to shoot a zombie from up close . Fixed map generation bug related to generating too many trees . Fixed some animations not synchronizing on multiplayer