Emit both $STALK and $PSMDST (#12)

* Emit both $STALK and $PSMDST

Adds support fro Miniplex 3 multiplexers with seatalk translation

README.md

@@ -9,7 +9,7 @@ To be able to acknowledge pilot related alarms through the GUI you need to insta
 
 This currently only supports Raymarine NMEA 2000 and Raymarine Seatalk 1 Autopilots, but I'll be adding support for other autopilots as needed.
 
-For Seatalk 1 Autopilots to work, a device that can translate Seatalk datagrams back and forth within an NMEA0183 sentence is required. They may be purchased from [Digital Yacht](https://digitalyachtamerica.com/product/st-nmea-usb/)) or [gadgetpool](http://www.gadgetpool.eu/product_info.php?products_id=54). For an example guide, see [TinyNMEA-USB.md](TinyNMEA-USB.md)
+For Seatalk 1 Autopilots to work, a device that can translate Seatalk datagrams back and forth within an NMEA0183 sentence is required. They may be purchased from [Digital Yacht](https://digitalyachtamerica.com/product/st-nmea-usb/), [Shipmodul (Miniplex 3)](http://www.shipmodul.com/en/index.html) or [gadgetpool](http://www.gadgetpool.eu/product_info.php?products_id=54). For an example guide, see [TinyNMEA-USB.md](TinyNMEA-USB.md)
 
 Also, signalk-to-nmea0183 plugin with APB (for route control) and MWV (for wind steer) should be enabled.
 

raymarinest.js

@@ -65,6 +65,12 @@ module.exports = function(app) {
     ])
     app.debug("datagram: " + datagram)
     app.emit(outputEvent, sentence)
+
+    var sentence = toSentence([
+      '$PSMDST',
+      datagram
+    ])
+    app.emit(outputEvent, sentence)
   }
 
   pilot.putTargetHeading = (context, path, value, cb) => {