Container system now equipped to handle swoops/cells better

Brief
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The container system now handles swoops/cells better.

Issues
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* Players loading in near players on vehicles will sometimes not see the vehicle player. Upon using the /tar command it becomes apparent that the vehicle player is at 0, 0, 0. The containment message is sent along with the create, so it is much more likely that is issue is due to an aspect of the networking layer than the awareness/containment system.