commandCharacters only works one way.

[Gerppuli]

So, what I'm trying to use the bot for is forwarding the songrequests from Twitch chat to my Discord MusicBot. The problem is that it only detects the message as a command when posting from Discord to Twitch, not the other way around. Example: http://imgur.com/a/6uRVr

[Throne3d]

Is there any need to have the command characters differ (so e.g. only ! counts as a command character for IRC, but both ! and @ count for Discord), or would it work fine to use the same commandCharacters list both ways?

[Throne3d]

(The PR referencing this assumes there's no need for the command characters to differ.)