lcd/lcd: add char and file read ability
lcd/lcd: document all functions
io/led: add basic led debugging ability (and LED_BLOCK hackery)
redo: use double quotes in find invocations for consistency
redo: fix broken 'set -e' functionality in redo
doc/todo: add several areas of note
gitignore: fix absolute directory path patterns
lib/FatFs: import ELM FatFs library for fat32
storage/fatfs_diskio: implement stubs for FatFs disk layer