debug/reset: bring back reset_defuse
rtc/ds1302: fix pullups being enabled on IO
rtc/ds1302: fix missing /CE on read finish; use t_CWH here as well
rtc/ds1302: remove debug printf's
lcd/hd44780: optimize array loops
rtc/ds1302: implement burst mode
rtc/ds1302: fix broken burst read (need eighth SCLK pulse)
rtc/ds1302: rename CK register enum values
conv/bcd: implement 8-bit packed bcd encoding and decoding
rtc/rtc: implement generic interface using struct tm
time/clock: load system time at init, and tick thereafter
time/clock: remove timer0 hook warning
rtc/rtc: implement rtc_set_tm
main: demo new clock functionality