board: Initial import of stm32f0discovery
cpu: Initial import of cortex-m0_common
cpu: Initial import of stm32f0
tests/examples: added stm32f0discovery to ignorelists
Merge pull request #1291 from haukepetersen/board_stm32f0discovery

Board stm32f0discovery
shell: prepare a rudimentary IEEE 802.15.4 packet

The transceiver module expects an `ieee802154_packet_t` instead of a
`radio_packet_t` if the device supports the IEEE 802.15.4 packet format.
This commit fixes the corresponding transceiver shell command for
`txtsnd` to set destination address (short address mode), payload, and
length accordingly.
Merge pull request #1434 from OlegHahm/fix_txtsnd_ieee802.15.4

shell: prepare a rudimentary IEEE 802.15.4 packet
board: Initial import of stm32f4discovery
cpu: Initial import of stm32f4
cpu: Initial import of cortex-m4_common
test/examples: blacklisted stm32f4discovery
Merge pull request #1191 from haukepetersen/board_stm32f4discovery

board: Initial import of stm32f4discovery board