Add support for emote parsing in sent messages & on non-Twitch servers

[sbine]

Twitch IRC servers prepend an 'emotes' message tag to every received message which contains information about the emote content of the message. Currently TextualKappa displays emotes by parsing these directives and replacing emotes accordingly.

The alternative is to parse emotes using regex (this Twitch API endpoint lists emote regexes under the key "emoticons" > "regex"). Switching to regex-based parsing will allow the plugin to parse emotes in sent messages, and on manually enabled non-Twitch servers, as neither of these types of messages contain the 'emotes' tag.