Support of LoRaWAN 1.0.1 final

[tibortiz]

As I can see on the README.md, the current implementation is based on LoRaWAN 1.0.1 draft 3. I did first a quick comparison between LW 1.0.1 draft 3 and the final version: https://www.draftable.com/compare/aywIsYazscsj

Here are the main differences (very few):

• General refactoring and typo correction
• New paragraph page 20 to explain that FPort 224 is dedicated LoRaWAN Mac layer test protocol when draft 3 just say that FPort 224 to 255 are reserved
• RXParamSetupAns and RXTimingSetupAns but there is no impact on packet parsing or generation.

By checking quickly the difference it will be possible to say that the lora-packet module is LW 1.0.1 compliant

[anthonykirby]

I've updated the docs, many thanks!