Garrison Building
Added a Garrison Building that can allow a Castle to have a full stack of Garrison when a Citadel(Level 5 Castle) and Garrison Hall(Level 4 Garrison) is built.
Town Watch and Outpost can be build early, while Garrison and Garrison Hall needed Heaven&Earth and The five elements respectively.
Garrison building also gives a small repression bonus to the province.
This does means that a Fort(Level 1 Castle) can have more than just a Samurai Retainer for it’s garrison if the 1 slot is used to build the Garrison Building.
