added needed module for agilefox board
started adding at86rf231 driver

at86rf231 transmission and receiption

driver is using vtimer instead of hwtimer_ function, TO CHECK

vtimer debug function prototype fix
bugfixes related to size and buffers
added AT86RF231 payload size
HACKS to get sixloawpan working with at86rf231
HACK : disabled TCP init and a hwtimer_wait, causing agilefox to HARDFAULT
stash, playing around with sixlow
fixed sixlowpan includes in rpl
Merge branch 'agilefox_plugtest' into 6LoWPAN_PLUGTEST

Conflicts:
	Makefile.modules
	sys/include/transceiver.h
	sys/net/sixlowpan/sixlowip.c
	sys/net/sixlowpan/sixlowmac.c
	sys/transceiver/Makefile
	sys/transceiver/transceiver.c