vtimer: fix integer overflow in vtimer_now() for MSP-430
Merge pull request #1021 from Kijewski/vtimer_now-no-16bit-overflow

vtimer: fix integer overflow in vtimer_now() for MSP-430
core: fix warning about discarding volatile
Merge pull request #1027 from mehlis/core-tcb-warning

core: fix warning about discarding volatile
native: update support for FreeBSD

works with FreeBSD 10.0 amd64/i386

fixes: #505
native: add tapsetup-freebsd.sh