Linux: Serial minor update (#1053)

- The symlink name for the PTY device is set using --my-serial-port
  making --my-serial-pty deprecated
- Replace MY_LINUX_IS_SERIAL_PTY with MY_LINUX_SERIAL_IS_PTY
- MY_DEBUGDEVICE can be used to print debug messages from MySensors
  (as it is currently in the other architectures)
- Rename SerialSimulator class to StdInOutStream
- Remove old deprecated option --my-radio

drivers/Linux/StdInOutStream.cpp

@@ -0,0 +1,56 @@
+/*
+ * The MySensors Arduino library handles the wireless radio link and protocol
+ * between your home built sensors/actuators and HA controller of choice.
+ * The sensors forms a self healing radio network with optional repeaters. Each
+ * repeater and gateway builds a routing tables in EEPROM which keeps track of the
+ * network topology allowing messages to be routed to nodes.
+ *
+ * Created by Henrik Ekblad <henrik.ekblad@mysensors.org>
+ * Copyright (C) 2013-2017 Sensnology AB
+ * Full contributor list: https://github.com/mysensors/Arduino/graphs/contributors
+ *
+ * Documentation: http://www.mysensors.org
+ * Support Forum: http://forum.mysensors.org
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ */
+
+#include <stdio.h>
+#include "StdInOutStream.h"
+
+void StdInOutStream::begin(int baud)
+{
+	(void)baud;
+}
+
+int StdInOutStream::available()
+{
+	return 1;
+}
+
+int StdInOutStream::read()
+{
+	return getchar();
+}
+
+size_t StdInOutStream::write(uint8_t b)
+{
+	return (size_t)::printf("%c", b);
+}
+
+int StdInOutStream::peek()
+{
+	return -1;
+}
+
+void StdInOutStream::flush()
+{
+	fflush(stdout);
+}
+
+void StdInOutStream::end()
+{
+	flush();
+}