cpu: initial import of stm32f1
boards: initial import of iot-lab_M3
Merge remote-tracking branch 'thomas/thirdparty_boards_import' into ietf90

Conflicts:
	examples/ccn-lite-client/Makefile
	examples/ccn-lite-relay/Makefile
	examples/riot_and_cpp/Makefile
at86rf231: added missing include