* Removed SnapGridOffset, there is only center now.
* SnapGridComponent methods are now static.
* Removed SnapGridComponent.OnPositionChanged.
* Refactored static functions off SnapGridComponent to MapGrid.
Refactored away usages of SnapGridComponent.Position.
* Added Transform.Anchored for checking if an entity is a tile entity.
More refactoring for static MapGrid functions.
* Static snapgrid methods on MapGrid are no longer static.
* Removed IMapGrid.SnapSize, it is now always equal to the IMapGrid.TileSize.
* Add setter to ITransformComponent.Anchored.
Removed direct references to SnapGridComponent from content.
* Grid functions now deal with EntityUids instead of SnapGridComponents.
Began renaming public API functions from SnapGrid to Anchor.
* Add some unit tests.
* SnapGridComponent now anchors itself in startup, instead of Initialize (sending directed events in init is an error).
* Refactors MapManager to not do any networking.
Now, ServerMapManager and ClientMapManager handle any networking.
* it's christmas in april!
* Remove comented line
* Remove useless seal
* Fix incorrect semicolon
* Event is no longer overriden, has a protected Invoke method instead
