Merge pull request #3207 from haukepetersen/mv_nrf

boards/airfy-beacon/Makefile.include

boards/pca10000/Makefile.include

boards/pca10005/Makefile.include

boards/yunjia-nrf51822/Makefile.include

cpu/nrf51/Makefile

cpu/nrf51/Makefile.include

cpu/nrf51/cpu.c

cpu/nrf51/hwtimer_arch.c

cpu/nrf51/include/cpu_conf.h

cpu/nrf51/include/hwtimer_cpu.h

cpu/nrf51/include/nrf51.h

cpu/nrf51/include/nrf51_bitfields.h

cpu/nrf51/include/nrfmin.h

cpu/nrf51/include/periph_cpu.h

cpu/nrf51/ldscripts/nrf51x22xxaa.ld

cpu/nrf51/ldscripts/nrf51x22xxab.ld

cpu/nrf51/lpm_arch.c

cpu/nrf51/periph/Makefile

cpu/nrf51/periph/cpuid.c

cpu/nrf51/periph/gpio.c