Apply badges to chat messages
Apply badges to chat messages

This checks for the following properties of `messageData`:

* If `from` matches `ReChat.Playback.channelName` => `broadcaster`
* If `usertype` matches one of `mod`, `global_mod`, `admin`, `staff`
* If `turbo` is true
* If `subscriber` is true

The badges are constructed using `ReChat.Playback._buildBadge` so
if badge styling needs to be updated, only `_buildBadge` needs to be edited.

pencil/rechat,pencil/rechat,pencil/rechat