Alpha 6.4 patch notes

Update:
- Fix issue with Story Moments not gifting resources correctly.
- Fix for hidden clan symbols in the banner edit.
- Fix for music levels in game.
- Fix for save versioning bug. (Invalidates previous saves)
- 'Move to campfire' now resets pathfinding also. (temporary
workaround for stuck goblins)
- Fix for hard crash when goblins are collecting water when
a building is destroyed by fire.
- Fix for resource nodes staying on fire forever.
- Added full resources icon above buildings that have their
outgoing resources capped.
- Fix for spans on walkway bridges being too vertical.
- Fix for raw iron and stone nodes not being loaded correctly.
- Fix for woodcutters standing round not working.
- Fix for resources in the region map selection not displaying.
- Fix for camera pausing. ( Other camera changes too )
- Fix for Terrain shader being clipped by camera.
- Rebalance hazards: fire spread chance lowered, disease spread area shrunk.
- Reduced birth rate.
- New overcrowded icons.