NETSTACK_LLSEC: Hardware-independent interface to the symmetric-key
algorithms of 802.15.4
sky-main: Calling NETSTACK_LLSEC.bootstrap from contiki-sky-main.c
sky-main: DEBUG on/off switch
packetbuf: Added security-related attributes
framer-802154: Defferring hdrreduce, so that an llsec_driver can access the entire frame
framer-802154: Support for creating and parsing frames with security
headers
framer-802154: Support for setting and accessing the frame type
attribute
framer-802154: Sequence number fixes
framer-802154: Renamed variable
framer-802154: Simplification of frame802154_create
framer-802154: Supporting key identifier mode 1
framer-802154: Calling NETSTACK_LLSEC.on_frame_created()
CC2420: Doing CRC in hardware all the time
CC2420: Macros as functions for saving program memory
CC2420: CC2420_WRITE_RAM with parameterizable ordering + resulting
simplifications
CC2420: The crystal oscillator only needs to stabilize on startup
CC2420: The variable "pending" was never used
CC2420: Removed unused variables
CC2420: Eliminated duplicated code in cc2420_read
CC2420: Reusing getrxdata instead of getrxbyte.