ChatbotManager extended, GoogleSearch and YouTubeSearch as plugins implemented
Merge remote-tracking branch 'origin/master'

Conflicts:
	src/webchat/app/websocket/WebsocketMessage.java
	src/webchat/app/websocket/WebsocketReceiver.java
	src/webchat/app/websocket/json/out/Message.java
ChatbotManager extended, GoogleSearch and YouTubeSearch as plugins implemented