Merge pull request #2766 from kaspar030/add_dev_eth

boards/native/Makefile.features

cpu/native/Makefile

cpu/native/include/dev_eth_tap.h

cpu/native/ng_net/Makefile

cpu/native/ng_net/dev_eth_tap.c

cpu/native/startup.c

sys/auto_init/Makefile

sys/auto_init/auto_init.c

sys/auto_init/dev_eth/Makefile

sys/auto_init/dev_eth/dev_eth_autoinit.c

sys/include/dev_eth_autoinit.h

sys/include/net/dev_eth.h

tests/dev_eth/Makefile

tests/dev_eth/main.c