python 3 Eddystone decoding

[ccloquet]

Thanks for this great piece of code!

A tiny python3 improvement:

in ScanUtility.py
on line 71

should be replaced by smth like
~~~url = prefix + bytes.fromhex(hexUrl).decode('utf-8')~~~

[bowdentheo]

Thanks @ccloquet I'm going to spend some time making a few changes. Will add this to the list.