Replace unmaintained Shout with its official community fork

The Lounge is a community initiative started earlier this year, after development on Shout stopped.
Demo looks sloppy at the moment, I know...

See https://github.com/erming/shout#official-forks

README.md

@@ -268,7 +268,7 @@ _Mass mailing software - one message to many recipients_
   * [IRCAnywhere](http://ircanywhere.com/) - Open-source self-hosted alternative to IRCCloud. ([Source Code](https://github.com/ircanywhere/ircanywhere)) `JavaScript` `Nodejs`
   * [Quassel IRC](http://quassel-irc.org/) - distributed IRC client, meaning that one (or multiple) client(s) can attach to and detach from a central core. ([Source Code](https://github.com/quassel/quassel)) `GPLv2` `C++`
   * [Robust IRC](https://robustirc.net/) - RobustIRC is IRC without netsplits. Distributed IRC server, based on RobustSession protocol. ([Source Code](https://github.com/robustirc/robustirc)) `BSD` `Go`
-  * [Shout](http://shout-irc.com/) - The self-hosted web IRC client. ([Demo](http://demo.shout-irc.com/), [Source Code](https://github.com/erming/shout)) `MIT` `Nodejs`
+  * [The Lounge](https://thelounge.github.io/) - The self-hosted web IRC client. ([Demo](https://avatar.playat.ch:1000/), [Source Code](https://github.com/thelounge/lounge)) `MIT` `Nodejs`
   * [Weechat](https://weechat.org/) - A fast, light and extensible chat client. `GPLv3` `C`
   * [ZNC](http://wiki.znc.in/ZNC) - An advanced IRC bouncer. ([Source Code](https://github.com/znc/znc)) `Apache` `C++`