New features in CC: Tweaked 1.86.1

* Add a help message to the Lua REPL's exit function
* Add more MOTD messages. (osmarks)
* GPS requests are now made anonymously (osmarks)
* Minor memory usage improvements to Cobalt VM.

And several bug fixes:
* Fix error when calling `write` with a number.
* Add missing assertion to `io.write`.

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