* Added new ComponentEventBus, combined it with IEventBus.
* Removed all traces of IEntity from ComponentDependencies.
Removed IEntityManager dependency from ComponentManager.
* Added entity create/delete events to IEntityManager.
* ComponentEvents now use EntitySystemMessages instead of their custom ComponentEvent class.
* Component events are now just overloads of entity events.
* Removed obsolete EntitySystemMessage, now everything uses the base EntityEventArgs.
* Add a bool argument for if the message should be broadcast as well as directed.
Fix ordering and init issues of events in EntityManager.
* Changed names from Component/Entity events to Directed/Broadcast.
* Fix bugs and unit tests.
* 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.
* rework ComponentManager
create indexing solution, UniqueIndex
split out ComponentEventArgs, add sealed variants
fix up documentation
fix terrible crap
make benchmark work
* woops, ordered enumerables are already a copy
* naming
* clean up comments
* nullable enable
* add some doc comments to unique index
* perf tweaks
add UniqueIndexHkm for high key mutability
extract internal interface mostly for documentation
add nullability support and constraints
* fix doc comment for UniqueIndexHkm
* make PVS threaded
* remove redundant member declarations in interface
* fix grid loss crap on client shutdown
* fix nullability warning when retrieving from always constructed threadlocal
* add comment explaining chan == null check
remove inParallel parameter
