camera.h comments on iso related settings
remove incorrect, non-functional return value from lua switch_mode_usb
Add .CSV to list of file extensions that the file browser will open using the text reader module.
Update to finsig_dryos.c to detect interrupt functions (from srsa_4c):
http://chdk.setepontos.com/index.php?topic=6560.msg102971#msg102971
make lua and ubasic set_record work if a USB connection is present, by calling switch_mode_usb. Suggested by rudi in http://chdk.setepontos.com/index.php?topic=9582.msg98447#msg98447
display "market" ISO override in CHDK OSD