How to use the game controller:
After setting a channel, right-click the controller to start/stop using it.
While using a controller, it will send a table with the control inputs, pitch, yaw, look vector, and name of the player using the controller each time one of these values changes, up to 5 times per second.
When a player leaves a controller, the string "player_left" is sent.
In addition to right-clicking the controller in use to stop using it, the following will also cause a player to stop using the controller:
* The controller is moved or removed
* The player leaves the game
* The controller receives the string "release" on its digilines channel