Copious debug output when an insufficient number of regions exist on the server

Via a spigot report:

```
[16:04:28] [Server thread/INFO]: Not enough points to triangulate mesh, all regions will be connected to each other. Add more regions!
[16:04:28] [Server thread/INFO]: Triangulating mesh for world...
[16:04:28] [Server thread/INFO]: Could not generate polygon for region Spawn
```

Doesn't need to be INFO, can be set to DEBUG or TRACE instead.