core: sched.c did not compile with DEBUG=1
Merge pull request #1962 from Kijewski/sched-fix-debug-1

core: sched.c did not compile with DEBUG=1
core/sched: unify DEBUG text syntax, nomenclature
Merge pull request #1999 from LudwigOrtmann/sched_debug_unify

core/sched: unify DEBUG text syntax, nomenclature
transceiver: fix ignore command for 802.15.4 radios
oneway-malloc: fix prototype for calloc

The prototype differs from stdlib
Merge pull request #2001 from OlegHahm/oneway_calloc_signature

oneway-malloc: fix prototype for calloc
Merge pull request #2000 from OlegHahm/ieee802154_transceiver_ignore

transceiver: fix ignore command for 802.15.4 radios
cpu/nrf51822: added HFCLK initialization
boards: added CLOCK defines to NRF based boards
boards: adjusted TIMER_0 defines for NRF based b.

adjusted for
- pca10000
- pca10005
- yunjia-nrf51822
cpu/nrf51822: fixed timers

- changed TIMER_0 to be a 24-bit timer -> see Nordic PAN #32
- cleaned up timer initialization code
- added check if an interrupt channel was active
tests: added test for nrf51822 peripheral radio
cpu/nrf51822: added driver for radio in the SoC
SQUASH: cpu/nrf51822: work in progress for radio
squash: cpu: fixes to radio driver
radio: more more more
radio: more shit - WORKING HERE
radio more fixes
readio: more more more