* Removed IBaseSession, pushed all members down to ICommonSession.
* Pulled all members of client IPlayerSession into ICommonSession.
Marked client IPlayerSession as obsolete, use the base ICommonSession.
* Restricted setter access for properties in ICommonSession, only engine should be setting them.
* Fixed ping implementation on server.
* Moved AttachedEntityUid to ICommonSession.
* Added a shared IPlayerManager and pulled some common properties down to it.
* Added a shared player Filter class that holds a set of recipients in a networked call. Very useful for selecting recipients in a shared context.
* 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.
* Renamed shared ICommand to IConsoleCommand.
* Lots of refactoring into a shared context.
* Removed ICommonSession from server concmd Execute.
* Added argStr parameter to concmd execute.
* The execute function of client concmds now returns void, use the new shell.RemoteExecuteCommand function to forward commands.
# Conflicts:
# Robust.Client/Console/Commands/Debug.cs
* Finally move shells and commands into shared.
* Console commands can now be registered directly without a class in a shared context.
* Pulled up ConsoleHost and Console shell into a shared context.
* Pulled up half the functions of ConsoleHost into a shared context.
* Repair rebase damage.
* Make LoadConsoleCommands function not remove any previously registered commands.
