Merge remote-tracking branch 'upstream/master'

Makefile

Makefile.base

Makefile.dep

Makefile.include

Makefile.modules

core/Makefile

core/include/atomic.h

core/include/bitarithm.h

core/include/clist.h

core/include/debug.h

core/include/hwtimer.h

core/include/hwtimer_arch.h

core/include/kernel.h

core/include/kernel_intern.h

core/include/lpm.h

core/include/msg.h

core/include/mutex.h

core/include/oneway_malloc.h

core/include/queue.h

core/include/sched.h