[paho-dev] Contributing

[Roger Light <roger@xxxxxxxxxx>]

Hi all,

I've updated CONTRIBUTING.md for the Python client to include some
description of how to get the source from git and push back using
gerrit, along with CLA, signed-off-by and the commit hook suggested by
Alan.

Take a look and feel free to use it for the clients that you look after:

http://git.eclipse.org/c/paho/org.eclipse.paho.mqtt.python.git/tree/CONTRIBUTING.md

Cheers,

Roger