Publisher/Subscribe example also for JSON data and ProtocolVersion in the init

[tropxy]

docs: Added a Publisher example, how to handle with the Client arguments and added an example of how to deal with JSON data; included ProtocolVersion in the init.py so that we can directly summon the Enum from the package import

This addresses #63

[frederikaalund]

Looks good! 👍

I have two requests:

• Let's move the examples to an /examples folder to not clutter README.md. I like to keep the readme simple. :)
• I like the change to __init__.py. 👍 It's unrelated to the docs, though, so can you move it into a separate commit?

Does it make sense?

[tropxy]

Yup, it all makes sense. I initially added an examples folder, but then usually one creates python scripts to exemplify whatever is the use case you trying to exemplify and in this case I thought it is just easier to show in a Markdown file how it works and add comments there as necessary. Do you think it would make sense to create an Examples.md? Or you really prefer to have scripts?

[frederikaalund]

Both .py and .md works for me. 👍 Whatever you prefer. This is the start of the documentation that we don't currently have. :))

[tropxy]

Both .py and .md works for me. 👍 Whatever you prefer. This is the start of the documentation that we don't currently have. :))

I hope it looks better now

[frederikaalund]

Looks good to me. Thanks for your contribution to asyncio-mqtt. :) 👍

[tropxy]

My pleasure! I hope we can do like a proper doc page in the future ;)