don't encode UTF-8

[Oreolek]

My terminal locale is UTF-8, my dfrotz puts plain Unicode (not ASCII) output, so the bot encodes Unicode twice into gibberish.

Here's a patch: src/MessageHandler.js, like 310

-    var final = stripAnsi(utf8.encode(this.compiledOutput));
+    var final = stripAnsi(this.compiledOutput);

[ava-cassiopeia]

Thanks for submitting a bug, this is good to know, and I will try to address it when I can.

The UTF-8 encoding is necessary for non-UTF-8 locale terminals, so there will need to be some sort of locale checking involved in this as well.