After much consternation, finally got the code generalized. For
some reason the ESP8266 absolutely cannot pass pointers between
functions. I'm not sure if this is because it's a timer function?
Either way, we have to memcpy the values, which makes things a
bit messier, but not too bad.
Now to start work on Publish...
Created a README, as yet incomplete. Added more files to the gitignore
to get rid of emacs temporary files. Currently making the mqtt_send command
independent of connecting, which is all it can do currently.
The code is now pretty messy, as I've just been hacking it
together so far. It's basically hardcoded, so the next steps
will be to parameterise everything. I also need to rethink
the data structures, and function names/structures.
I need to make this feel more like an API to be called by
a user. This will naturally help organize the functions.
