More core changes:

- Only published to Skyrim objects have identifiers. This slows down identifier generator 'reuse old id' <-> 'get new id' flow
- Only published objects have prolonged (10 sec) lifetime. The rest will have much shorted lifetime.
  This approach helps free memory much faster. For instance with old approach big tree of object with depth 8 will have lifetime ~8 * 10 seconds. Now it takes ~10 + 7*1
- ObjectRegistry, AutoreleaseQueue: use more appropriate STL containers