add oonf_api pkg
moved debugging statements from header to c file

Additionally, declaring the stacks as static.
amendment - to be squashed
tests: add test that shows sequence of received messages
test_thread_msg_seq: add missing main() return statement
Replace '-' with '_' in BOARD and CPU_… macros
Fix BOARD macro
core:mutex: allow idle thread to use mutexes
Add test if the message queue is fair
use cpu dependent stack size
removing possible invalid check

Checking for a link local address to determine if a node is on-link is
probably not a valid assumption in most wireless networks.
fix ignore command
use forwarding table entry when routing

So far the entry was looked up, but ignored in the case where the packet
has to be forwarded.
added missing hdr position shift
Change reboot signature.

Change from `void reboot(void)` to `int reboot(int mode)`.
Move reboot definition to core, rename architecture implementations
from reboot to reboot_arch.
Declare reboot mode(s) in kernel.h, reboot_arch in kernel_internal.h
Currently only one reboot mode is handled, its use is enforced.

Rationale:
A reboot function is already defined in <unistd.h> on BSD systems.
(See: http://www.openbsd.org/cgi-bin/man.cgi?query=reboot&sektion=2)
This patch not only allows native to build sensibly on these systems
but also streamlines RIOTs compatability with existing software.
shell: accept UTF8 input
shell: don't ignore IO errors
shell: add myself to authors
notify lowpan_transfer when IP packet is not routable

The IP process silently discarded an unroutable packet without replying to the 6LoWPAN layer, causing that thread to starve.
amendment to 169976f