LoRaWAN module review request

This ns-3 module allows the simulation of a LoRaWAN network.

Github repo: https://github.com/DvdMgr/lorawan

[Davide Magrin, 2017-09-30 16:33:26]

Hello everyone,
I'm Davide Magrin, a PhD student at the University of Padova. I wrote the module
contained in this issue during my master's thesis, with the objective of
simulating a LoRaWAN network in ns-3. Now that it has reached a sufficient level
of complexity, we would like to share it and ask for the community's feedback.

This issue, besides the module code, also contains adjustments to the
documentation makefile, so that you can compile the src/lorawan/doc/lorawan.rst
correctly and view the module description in a browser. The .rst file contains a
description of the module, its current state of completion and its limitations,
referencing the relevant papers and datasheets that guided the design.  

Since this issue on rietveld was mainly created to have feedback on code, I'll
also be starting a thread on the ns-developers mailing list in order to discuss
more high-level design issues (like the implementation of a possibly very
complex Network Server, or the choices I've made in the MAC layer design). You
are welcome to share your thoughts on the channel you deem the most appropriate.

A public repository containing the full module can also be found at
https://github.com/DvdMgr/lorawan. I'll monitor that repository for issue
tracking and (hopefully) future contributions by the community via pull
requests.

Thank you!

-- Davide