Moved out messages ConnectionWasLost, ConnectionClosed, IncomingMessage from as.sparkanta.ama.actor.tcp.connection.TcpConnectionHandler to as.sparkanta.gateway.message.
Moved NewIncomingConnection message out of as.sparkanta.ama.actor.tcp.server.TcpServer to as.sparkanta.gateway.message.
Moved DeviceIsDown out of as.sparkanta.ama.actor.tcp.message.IncomingMessageListener to as.sparkanta.gateway.message.
Added as.sparkanta.internal.message.MessageToDevice that allows OutgoingMessageListener to pickup this message and send to wire.