Multiplayer hotfix #1

First hotfix of the new update, with more to come

-Updated the trade route syncing so that it shows up correctly for other players

-Changed building option visibility for other players (hopefully the building options don't have to be individually unlocked for non hosts)

-Potentially fixed resource syncing issues (needs more testing)

-Updated pathfinding, should be way more performant but if there are issues please let me know

There are a few more things I need to take a look at and try to fix (like the quest system syncing), but they'll take a bit longer.

While I can test basic multiplayer stuff by myself in a smaller simulated setup, I can't really test the main game fully with multiplayer because I only have one computer. :(

I should be able to get someone to help me test things tomorrow so hopefully I'll be able to resolve some of the other issues then.

And also thanks for all the help in finding these bugs!