Elegant Shutdown, Toggle-able physics.

Closing the console window, or sending a SIGTERM to the process with CTRL+C will cause it to elegantly reset your playspace and disconnect fake trackers before shutting down.

Restarting the app will make it automatically detect if trackers were already created, and use those ones instead of creating new ones. Feel free to restart it all you want!

You can toggle physics with a bind now also. Check out https://github.com/naelstrof/VRPlayspaceMover#physics for more info!