Simplify sensor IO model and fix opts and timeouts
no need to handle FIFO directly after all - if we catch the SIGPIPE,
shell redirection works beautifully.
- [DBH] x5/Makefile
- [DBH] x5/khatus_lib_sensor.c
- [DBH] x5/khatus_lib_sensor.h
- [DBH] x5/khatus_sensor_battery.c
- [DBH] x5/khatus_sensor_time.c