Fix reply in combination with message

[omnidan]

Right now we have to do:

(e, reply) => reply(message(e.channel, 'command not found'))

It would be much nicer if reply could add the channel to the message afterwards, but for that we have to change how message works (e.g. first argument text, then an optional argument to, but if it's not wrapped in reply it'll fail later because it doesn't have a to/recipient property)

(e, reply) => reply(message('command not found'))