When resolving a uri, defer obtaining a handle to the current GameInfo until we encounter a symbolic reference in the path. Furthermore, allow a returned handle to be the special "null-game" object as it now has defaults for DataPath and DefsPath (but not IdentityKey).
When resolving a uri, defer obtaining a handle to the current GameInfo until we encounter a symbolic reference in the path. Furthermore, allow a returned handle to be the special "null-game" object as it now has defaults for DataPath and DefsPath (but not IdentityKey).