One bug i have found, the "Upgrade trade post" does not seem to work at all, not a single thing gets upgraded

@Ash, it will only work if the owner of the trade post meets the requirements for the buildings. For most non-patrician characters, that means there will be no buildings at all unless the trade post is built along certain parts of the silk road. I didn't override any of the default building files that set those permissions, but the "Upgrade Trade Post" option will follow those guidelines when adding buildings.

Castles upgrade all cultural upgrades when using the "Fully Upgrade" button

@thecrazy13, the "Fully Upgrade" button is part of Sketchy's mod, not mine. I also didn't like that it added buildings that couldn't be used, and that was actually one of the reasons I decided to learn how to create this mod to begin with! If you use the "Upgrade Holding" option that's part of my mod, then it should only add buildings that the owner's culture can use.