make: Allow for include of modules outside of the RIOTBASE path
atmega_common: add ENOTSUP and ECANCELED to errno.h
pkg/Makefile.http: complete Makefile-example
native: add two more syscall declarations
Merge pull request #1746 from authmillenon/external_modules

make: Allow for include of modules outside of the RIOTBASE path
cpu/stm32f1: fixed gpio driver

- changed #ifdef to #if for device filter
- guarded file in case no GPIO device is defined
- added guards around interrupts
Merge pull request #1750 from backenklee/make_fix

pkg/Makefile.http: complete Makefile-example
Merge pull request #1751 from LudwigOrtmann/native_syscalls_p2

native: add two more syscall declarations
drivers: Provide basic interface for all network devices
tests: Add functionality test for netdev_base
Merge pull request #1752 from haukepetersen/fix_stm32f1_gpio

cpu/stm32f1: fixed gpio driver
Merge pull request #1492 from authmillenon/net-dev-base

drivers: Introduce a general interface for network device drivers
tests: fix netdev test
Merge pull request #1761 from authmillenon/netdev-fix

tests: fix netdev test
cpu/stm32f0: removed leftovers from slave mode
Merge pull request #1713 from haukepetersen/fix_stm32f0_spi

cpu/stm32f0: removed leftovers from slave mode
Notify about dropped packets

Added debug output that warns about packets that are dropped
because the transceiver buffer was full or because the transceiver
failed to notify aiting upper layers.
Merge pull request #1755 from Lotterleben/transceiver_debug_clean

transceiver: notify about dropped packets
board/iot-lab_M3: fixed default terminal device
Merge pull request #1760 from haukepetersen/fix_iotlab_term

board/iot-lab_M3: fixed default terminal device