New features in CC: Tweaked 1.85.0

* Window.reposition now allows changing the redirect buffer
* Add cc.completion and cc.shell.completion modules
* command.exec also returns the number of affected objects, when exposed by the game.

And several bug fixes:
* Change how turtle mining drops are handled, improving compatibility with some mods.
* Fix several GUI desyncs after a turtle moves.
* Fix os.day/os.time using the incorrect world time.
* Prevent wired modems dropping incorrectly.
* Fix mouse events not firing within the computer GUI.

Type "help changelog" to see the full version history.
