* Refactors EntityManager to not do any networking.
ServerEntityManager and ClientEntityManager now do the networking instead.
* Rename property for "backwards compat."
* Remove comented out code in robust server simulation
* Removed the Interfaces folder.
* All objects inside the GameObjects subfolders are now in the GameObjects namespace.
* Added a Resharper DotSettings file to mark the GameObjects subfolders as not providing namespaces.
* Simplified Robust.client.Graphics namespace.
* Automated remove redundant using statements.
* Fix client-side input system not sending sequence numbers for input messages.
This caused message ordering issues and keys getting stuck down.
* Make sure EyeUpdateSystem runs after physics.
* IGameTiming.TickFraction helper.
* Subtick data for input commands.
* Literally a unit test to verify that I wasn't going insane while debugging input message ordering issues.
* More prediction logs behind net.predict.
* Move physics to shared and run it on the client.
* Synchronize grid gravity.
* Fix ResetPredictedEntities crash when entities get deleted server-side.
* Fix CollidableComponent setters not calling Dirty()
* Fix going into space while predicting.
* Watch window uses history line edit.
* Fix unpredicted objects stuck-jittering.
* VV tags for interp vars on transform.
* Fix 0 mass objects on client.
* Fix friction calculations being TPS dependent.
* Reset predict flag on handelComponentState
