Adding TwitchClientUnity that wraps TwitchClient and inherits ITwitchClient

[BjornGameDev]

It is for the old TwitchClient, the newest TwitchClient has already been updated, but as it forwards the actual implementation to TwitchClient, and inherits ITwitchClient it should be low maintenance to keep up to date.

[swiftyspiffy]

I know next to nothing about Unity, so I won't pretend to know what is going on in CoroutineHost.cs

My worry comes that we're going to constantly need to keep TwitchClientUnity up to date, and that worries me a bit. Is there absolutely no way to avoid needing to rewrite the whole client for unity?

[BjornGameDev]

The client actually wraps the TwitchClient, so it only needs to be updated if the interface changes.

[BjornGameDev]

Yes, it isn't beautiful. I wish I had found a cleaner way to do it. My goal was to keep the way you use TwitchLib the same, so the same docs can be used.

[swiftyspiffy]

Just sucks to add another place that needs to be constantly kept up to date, but fair enough. I'm going to wait for either @Syzuna @LuckyNoS7evin or one of the others to review this just because I'm not super familiar with Unity.

[LuckyNoS7evin]

Okay, approved this is Pulled in, I agree there may be a better way, I have an idea, but we should get there soon