xiuos/Ubiquitous/Nuttx/nuttx/wireless/ieee802154

This will eventually hold some general documentation for the IEEE 802.15.4
MAC implementation.

NOTE: Throughout the code, excerpts from the standard are quoted as to make
the code thoroughly readable. I have tried, to always put a reference [1] and
page number.  Below is the references that correspond with the reference number

[1]