* 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.
* Retrofitted ComponentManager_Test to use DependencyCollection.
* Renamed ComponentManager_Test to ComponentManager_Tests to follow naming conventions.
* Added component add/remove/delete events to IComponentManager.
Removed IEntity dependency from ComponentManager.
* Entities can now be spawned without a prototype.
* Removed unused function.
* CreateEntity now actually works with a null prototype ID. The other spawn functions should work as well.
Updated doc comments for IEntityManager.SpawnEntity().