Blacklist of usernames

[btcdrak]

There's a feature of the bot where @ is prepended to known usernames when piping text from IRC to Slack. However, if someone of slack registers a username like a or the, the bridge becomes quite obnoxious. It seems either the feature of prepending @ should be configurable (on/off) or additionally, to add a blacklist option to the config.json with an array of "do not prepend @" usernames.

https://github.com/ekmartin/slack-irc/blob/master/lib/bot.js#L163

[ekmartin]

I think an array of usernames is too specific (and too much of a pain to configure) - an option to turn it off could be a possibility though.

[btcdrak]

Seems good to me.

[btcdrak]

bump

[ekmartin]

See #154 @btcdrak.