Adds pre-existing SensorTag code and bluepy library

Signed-off-by: Oren Leiman <oleiman@neutral.io>
Adds 'discover' command to SensorTagRead

Signed-off-by: Oren Leiman <oleiman@neutral.io>
Adds 'discover' command to SensorTagRead

Signed-off-by: Oren Leiman <oleiman@neutral.io>