Decouple chat from core and add chat rest api (#25)

* Decouple the chat package from the core

* Add rest api endpoints for the chat aspect

core/core.go

@@ -8,6 +8,7 @@ import (
 	log "github.com/sirupsen/logrus"
 
 	"github.com/gabek/owncast/config"
+	"github.com/gabek/owncast/core/chat"
 	"github.com/gabek/owncast/core/ffmpeg"
 	"github.com/gabek/owncast/models"
 	"github.com/gabek/owncast/utils"
@@ -37,6 +38,8 @@ func Start() error {
 		return err
 	}
 
+	chat.Setup(ChatListenerImpl{})
+
 	return nil
 }