Contains the IDs of all the creation types of a specific "culture" or civilization/empire.
This maps each member of the ModelTypes enum to a creation ID.
const ResourceKey& Simulator::
cCultureSet:: SetCreation(ModelTypes creationType,
const ResourceKey& modelKey)
Assigns a creation to a certain type.
The available types can be found in the ModelTypes enum, such as "BuildingCityHall". The ResourceKey points directly to the creation model (the .bld, .crt,... files)