Ticket #22 (new task)

Description (Last modified by Matei)

• Some buildings can only be placed on other entities of the same size (eg Civ Centres on Settlements). Doing so replaces the base entity, but it reappears if the building is destroyed. Replacement entities can be rotated using the grid cursor as normal, though it has to align to the edges of the base entity. (Foundation cursor snaps to fit the plot's rotation.)

• Some buildings spawn sites adjacent to the main building when their construction is complete. (Notably, the Farmstead has four vacant lots, two horizontal, two vertical, surrounding it, and this is the only location where Fields and Corrals can be placed.)