Hotfix for navmesh - Zombies walking through closed doors

Update v0.019 –

- Fixed some of the roads that were showing overlaps in their texture, not noticeable during day but very noticeable at night.
- More clutter added throughout the island.
- Hill fort added
- Two small survivor camps added
- New loot spawn object, so you will now find some loot on hearthstones inside the old croft ruins. This model is very much versionv1 so don’t expect it to stay this way for long.