Unix Rio Utility Code

add missing prototypes and use new OSX swapping routines

clean up formatting of get_flist_rio

clean up compiler warning in id3 parser

clean up compiler warnings in mp3 parser

clean up compiler warnings

use libusb 1.0 API for device access

set librioutil libadd flags corectly

update configury and check for libusb 1.0

update configury and check for libusb 1.0

quiet compiler warnings