Bot fails to create a room when channel name or topic contains emoji

[brianpeiris]

[mqp]

Unfortunately, this is a limitation of Reticulum (https://github.com/mozilla/reticulum/issues/188), which barfs if you try to create a room with some Unicode characters. I will try to make the Discord bot more robust against this variety of Reticulum failure, though -- it shouldn't just silently not work.