Feat/stable server and client raft rendering

[zolantris]

This change fixes #23 #21. And probably all the issues in 1.6.2 release with server. There is an alpha release 1.6.3-alpha with these changes. Feel free to test.

Bugs

• [x] Fixes the raft render issues on client and server.
• [x] Fixes raft boat splits
• [x] Fixes raft planks disappearing on spawning of the raft

Bugs that need to be proven fixed

• [ ] local client & server (through the client).
• [ ] single player (need to confirm it's still stable)

Features

• [x] Adds SailingSpeed. Have fun!

Documentation

• [ ] Needs readme documentation.