Simplified operations to a single operation

      [ ADDED ]  Implemented a check for music image files that are greater
                 in quality than CD's (16bit/44.1kHz), converting the
                 CUE file from 'frames/sec' to 'milliseconds', allowing
                 'shnsplit' to work
[ ENHANCEMENT ]  Separate operations consolidated to one operation
[ ENHANCEMENT ]  Removed unecessary decoding of audio files, instead
                 using 'shnsplit's' native support for decoding audio
                 with the given audio format's native decoder/encoder