Moved definitions for Bindings of Eternal Night and Crown of Eternal Night back to ancient-elven-ruins/objects.lua.

resolvers.resolveObject: filter.base_list can be a list of objects (matches zone:makeEntity)

Elven ruins mummies will load their zone object list into the appropriate equipment resolvers (so they will always get their mummy wrappings, etc. in any zone where they are loaded).

Greater Mummies get headgear. (This slightly increases the chance to drop the Crown.)