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
cpu:cortex_common: add core_panic function
cpu: initial import of stm32f1
cpu:stm32f1: license cleanup and restructuring
cpu:stm32f1: add st header definitions
compiles but doesn"t link
intermediate commit
change to cortex_m3_common
removed all *not* needed header files
intermediate commit, some fixes to timer
fixed flashing scripts
solve PendSV interrupt issues
define TRANSCEIVER_BUFFER_SIZE
Makefile cleanup