Update code_gen.txt for A590 100e with filewrite hook fix from changeset 3353.
a1400: Fix get_target_dir_name()
precision USB remote fix from waterwingz in http://chdk.setepontos.com/index.php?topic=650.msg111941#msg111941 - don't run in regular kbd process when in hp timer mode
add directory iterator os.idir to lua, to avoid need to have entire directory listing in memory
Usage: for filename in os.idir('A/') do ...
llibtst.lua update for os.idir