* Stabilise MoveToWorld
* Fix comments and deprecate ScheduleMoveToWorld
* Enhanced thread safety for m_WorldChangeInfo
* Return unique_ptr from cAtomicUniquePtr::exchange
* cWorld now calls entity cEntity::OnAddToWorld and cEntity::OnRemoveFromWorld.
Allows broadcasting entities added to the world from the world's tick thread.
This also factors out some common code from cEntity::DoMoveToWorld and cEntity::Initialize.
As a consequence, cEntity::Destroy(false) (i.e. Destroying the entity without broadcasting) is impossible.
This isn't used anywhere in Cuberite so it's now deprecated.
* Update entity position after removing it from the world.
Fixes broadcasts being sent to the wrong chunk.
* Fix style
* cEntity: Update LastSentPosition when sending spawn packet
* Add Wno-deprecated-declarations to the lua bindings
* Kill uses of ScheduleMoveToWorld
Currently the player is spawned immediately in front of them.
Simply changing `cNetherPortalScanner::OutOffset` to 0.5 wasn't enough, as the player would always be spawned on top of the portal, however checking for non-solid blocks instead of air fixes this.
