algo/fifo: copy over from automaton project
redo: tweak compiler options a bit
dev/uart/uart: port code from automaton
io/stdfile: re-enable uart calls
debug/fatal: re-enable uart calls
mcu/clock: re-enable oscillator failure NMI infinite loop
mcu/die: re-enable uart calls
mcu/reset: re-enable uart calls
mcu/clock: add a warning
rtos/mutex: implement basic mutex
task: implement test tasks
rtos/rtos: fix SREG initialization, improve a bunch of things
main: run the test tasks