Merge pull request #1398 from haukepetersen/fix_hwtimer_arch

boards/mbed_lpc1768/hwtimer_board.c

core/hwtimer.c

core/include/arch/hwtimer_arch.h

core/include/hwtimer_arch.h

cpu/cc430/hwtimer_cc430.c

cpu/lpc_common/hwtimer_cpu.c

cpu/mc1322x/hwtimer_cpu.c

cpu/msp430-common/hwtimer_cpu.c

cpu/msp430x16x/hwtimer_msp430.c

cpu/native/hwtimer_cpu.c

cpu/sam3x8e/hwtimer_arch.c

cpu/x86/x86_hwtimer.c

pkg/openwsn/patches/opentimers.c.patch

pkg/openwsn/patches/scheduler.c.patch