fixes for the wsn430
fixed vtimer for the msp430
added spi module for the wsn430 v1.3b
changed some variables to uintXX_t, fixes overflow on msp430
created own module for ieee802154
this is needed to include the ieee802154 in drivers without the hole sixlowpan
added driver for cc2420
also added cc2420 to transceiver and added cc2420 shell commands
Merge branch 'master' of github.com:overflowed/RIOT

Conflicts:
	drivers/cc110x_ng/Makefile