Remove level4 from main menu

Signed-off-by: Travis Hairfield <twh116@gmail.com>
Survival mode changes

Signed-off-by: Travis Hairfield <twh116@gmail.com>
Merge branch 'staging' of https://github.com/weizjeidy/ZeroDarkZombie into staging

Signed-off-by: Travis Hairfield <twh116@gmail.com>

Conflicts:
	scripts/zombieClass2.js
Finish merge

Signed-off-by: Travis Hairfield <twh116@gmail.com>
Zombie only screams/rages if player is off safe blocks

Signed-off-by: Travis Hairfield <twh116@gmail.com>