Moving RXWatcher out of /Watcher

It didn't really need its own subfolder anymore.
Moving GoKit and MiniJson

GoKit and MiniJson are now going to be in Futile/ThirdParty instead of
/Plugins

Also, I put the MiniJsonExtensions in MiniJson.cs to keep things simple.
Fixing the banana game and renaming some assets
Cleaning up the banana demo game code

It had a bunch of old code that needed cleaning up.
Moving all the assets and banana game folder