Switched gatt implementation (superuser no longer needed) + decoded status + python3 + ...

[xrucka]

Hello,

I've ported the utility to use python3 with gatt-python library (dbus calls to bluez). However, there are some issues which pretty much reqiured to change the implementation of cli :-/ . Also, I've done some work on decoding the status bits and renamed the command. Please feel free to comment on.

The utility has been tested least by me for set+get+backup+restore. @miklik72 might be up to some testing as well (he's got a different model than I do) :-)

Regards, L.