Some bug fixes and improvments.

Tanks!

Fixed invisible Zombies.
Reduced military loot.
Some new tructures.
Improved loot.
More otter and boats spawns!
Added more details.
And more...

Safezone has been added!

Improved lighting!
Police Depot Isle is now biger!
New ship has beed added!
New building in Crescent Valley!
Some terrain changes.

No more zombies at Alberton ship and Courtin Isle.