WIP saturn cue/bin parsing

[sozud]

The Saturn cue/bin I have looks like this:

FILE "Akumajou Dracula X - Gekka no Yasoukyoku (J)(Saturn).BIN" BINARY
  TRACK 01 MODE1/2352
    INDEX 01 00:00:00
  TRACK 02 AUDIO
    PREGAP 00:02:00
    INDEX 01 45:30:63

I attempted to add MODE1/2352 support. It's able to extract some of the files, which seem to be correct, but some are missing. I'm not sure why that's happening. Maybe the Saturn disk uses some filesystem features the PSX one doesn't?

I had to change the track adding code to add more than one track per file, otherwise track 1 gets replaced with the audio track.

[sozud]

It's rejecting sectors that don't meet the offset+bufSafe > secSize requirement here. Maybe the missing files are there. Could you explain what the fix to this code would be?

		// horrible hack as it can read unnecessary bytes, but it works
		if offset+bufSafe > secSize {
			sec, err := readSector(file.reader, location(chloc), file.mode, false)
			if err != nil {
				return nil, err
			}
			data = []byte(sec)
			offset = 0
			chloc++
		} else {
			fmt.Print("rejected sector\n")
		}

[Xeeynamo]

// horrible hack as it can read unnecessary bytes, but it works

I do not remember it very well, but I think it was related to the fact in rare scenarios readSector needed to read either extra bytes or simply bytes overflowing to a new sector. That bufSafe is a buffer of safety to not crash the app in those rare scenario. I think I tweaked close to the minimum value before crashing. I am not very proud of that.