More work

examples/mqtt_arbitrary_buffer/README.md

@@ -2,6 +2,19 @@
 
 This example illustrates Publish an arbitrary data packet using the Adafruit MQTT library to an MQTT feed which can then be parsed by the included python subscriber client.
 
+
+## Installing and running Mosquitto
+###On a Raspberry Pi:
+```bash
+sudo apt-get install mosquitto
+```
+
+###On a Mac:
+```bash
+brew install mosquitto
+```
+
+
 ## Using Example Python Subscriber:
 
 Install dependents if haven't already