Building Civic Prereqs

and \"Hereditary Rule\" civics to be constructed. Also, a tag has been added to indicate that a building should be automatically obsoleted if the civics required to construct the building are no longer set. Note: Only Warlords Compatible
This mod adds new tags allowing for the specification of one or more civics as prerequisites for constructing a building. As an example all \"cathedrals\" now require the \"Organized Religion\"