storage/fatfs: rename; add get_fattime stub
io/uart: handle non-printable and CR/LF chars in uart fifo debug
io/uart: do clear the lcd before writing for fifo debugging
io/uart: use lcd_write instead of fputc
io/uart: add some more int flag debug statements
lcd/lcd: add lcd_rel_* for relative movement
std: add <ctype.h>
doc/todo: update and reformat