/action messages sent via Slackbot as well as in channels

[me-and]

When someone uses the /me does a thing syntax in Slack and IRC, it's presented as that user performing an action. With slack-irc-client, though, the actions come entirely separate from the channel they happen in as messages from Slackbot.

For example, in Slack, I have a direct message from Slackbot that looks like this, with no reference to the channel the action happened in:

CTCP notice from me_and ACTION waves

Normal IRC clients, however, show in the correct channel, for example:

me_and | here are some words in a normal message
     * | me_and waves

And regular Slacks format /me commands with italics, also in the correct title:

me_and here are some words in a normal message me_and waves

slack-irc-client should convert ACTION CTCP messages into regular messages that appear in the correct channel from the correct person, and formatted in italic to match actions in regular Slack.

I've not checked how slack-irc-client handles outgoing /me-style messages, as I don't currently have an easy set-up to do so, but if it isn't the case already, it should convert the thing to a CTCP ACTION message for sending back to the IRC server.

[me-and]

Correction! The messages do appear in the channels as I'd expect, they just also appear as DMs from Slackbot.

[aeirola]

I suppose this is the same issue as mentioned in #13, and is fixed by #16