Support components [WIP]

[Electroid]

Instead of using static string formatting, a SimpleChannel uses #getFormat() to dynamically generate a component message format. This means implementors inject special components (ie. click name to teleport).

This is a breaking change because of the formatting; however, you can still send messages and broadcasts as a string (it's converted to TextComponent).

[jedediah]

Nice, but in order to use this, the components will have to go through our custom rendering layer somehow. I guess we can do that by overriding sendMessageToViewer, which we already do in a few places anyway.

It will also have to work with ChatModerator, which will be interesting.