Alpha 6.1.5 Patch

Another small patch to fix some of the remaining pathfinding issues.

• Fixes an issue with pathfinding that would cause units to freeze up.
• Fixes an issue which could prevent advancing past the first wave.
• Fixed an issue that caused pathfinding to break if the keep was surrounded by battlements.
• Fixes a minor visual issue, Barracks blocks will now properly have a door when next to a battlement block