Surviv.io Zombie Apocalypse v1.4 Release

Huge update! I think you guys might find this one to be interesting ;).

• Grenades added - Grenade crates will spawn around the map, dropping 1-2 grenades. Be careful where you throw them though, one bad through and it could be the end of your run...
• All sound effects increased in sound, they were previously too quiet
• Miscellaneous bug fixes