* Added unit tests for the new anchor system design.
* Amend ME!
* SnapGridComponent now anchors the entity when added or removed.
TransformComponent.Anchored properly replicates it's state to clients.
* Converted all SnapGridPositionChangedEvent subscriptions to AnchorStateChangedEvent.
Removed SnapGridPositionChangedEvent.
Obsoleted SnapGridComponent.
* Allows setting Transform.Anchored in prototypes.
* Changing tile to empty under anchored ents unanchors them.
* More unit testing.
* Migrated transform gamestate tests to RobustServerSimulation.
* Fixed nasty off-by-one error when sending a full server state.
* Adds lifetime stages to Component.
* More test fixing.
* Review changes.
