FW-285. Cleaning up scheduler.h.
FW-285. Moving interrupt declarations around.
FW-285. Moving schedule.h in generic kernel/ folder.
FW-285. Dummy compilation of FreeRTOS.
FW-285. Have Travis build a FreeRTOS-based project.
FW-285. Fixing standalone IAR projects after moving scheduler.h.
FW-285. Build FreeRTOS code.
Merge pull request #111 from openwsn-berkeley/develop_FW-285

FW-285. Fix.