Continuing on developing the new StorageManager, starting to add support for saving to disk and restoring.
Implemented storage and restoring of global entities and core entity management state.
Initial work on chunk storage
- Removed Advanced Config and menu (dangerous, users shouldn't be messing with this)
 - A little cleanup.
Implemented core entity storage in chunk stores.
Added setBlockRetainComponent functionality to force a block to be retained
Some refactoring around the Storage Manager.