Support of LoRaWAN 1.0.2

[tibortiz]

Like the issue#25, I did another comparison between LW 1.0.1 final and the 1.0.2 final version: https://www.draftable.com/compare/xbpYDtNRPAPH

Here are the main differences :

• Physical layer moved to a dedicated document named "Regional Parameters" (last version for LW 1.0.2 (RevC) in attachment LoRaWAN Regional Parameters v1.0.2_revB.pdf
• Some typo correction and refactoring
• Two new MAC commands: (0x0A) DlChannelReq/Ans and (0x09) TxParamSetupReq/Ans
• Clarification regarding AppKey
• The end-device is able to process multiples ADRReq in a single block

It's not a big deal to be 1.0.2 compliant and I can help you to do it

[anthonykirby]

thank you, I've updated the docs. Our library doesn't (yet!) support the decoding of MAC commands, so the changes for 1.0.2 don't affect it.