Document support for Bluetooth Serial interface

[theycallmeswift]

Worked with @kymwatts to figure out bluetooth serial communication yesterday. Need to document how to get it all working so others can use it.

[theycallmeswift]

This depends on tino/pyFirmata#17 going in. Will also need to bump the dependency version

[kymwatts]

Some one posted a really good walk though for updating the firmware with an arduino:
http://www.instructables.com/id/Modify-The-HC-05-Bluetooth-Module-Defaults-Using-A/

Am in the process of getting the bluetooth serial working between a rpi/linux and an arduino. Am documenting as i go.
I forked your repo, so that i can add instructions for using your patched version of pyfirmata.

[kymwatts]

So i got this working on my raspberrypi.
I had to comment out your check for the firmware version in my local copy, because even thou your patch makes it return a None, that still breaks it for bluetooth serial.

I have added some instructions on how to setup the devices and how to find the port:
https://github.com/kymwatts/BreakfastSerial/blob/master/README.md

Seeing if i can roll the bluez-test-serial.py into the same script as arduino calls, that way you can hold the connection open for longer than 100sec.