core/thread: remove thread_create_arg from header

It's just a leftover from #856
Merge pull request #1397 from LudwigOrtmann/thread_fixup

core/thread: remove thread_create_arg from header
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
progress on SPI but not fixed yet
addressing @OlegHahm comments
vlacklisting iot-lab_M3 for some examples
fix rpl_udp example, insufficient_ram!?
fix iot-lab_M3 drivers Makefile