Removed some debug helper function (print back trace)
Fork in check_event_stat test in order to run the echo command in its own
process (trying to fix this test failing in the buildbot).
Added --enable-blocking-etb-ftb command line option to libtizonia. Both options
(enabled/disabled) are a experimental for now.
Renamed APIs from tizkernel_ -> tiz_kernel_
Renamed APIs from tizservant_ -> tiz_servant_
Renamed APIs from tizproc_ -> tiz_proc_
Renamed APIs from tizfsm_ -> tiz_fsm_
Renamed types and functions from tizsched_ -> tiz_sched_
Some reordering of functions in tizscheduler.c