cdio: CD I/O functions

cdioUnlockDrive()   : Unlock CD drive
cdioLockDrive()     : Lock CD drive
cdioOpenTray()      : Open a CD tray
cdioCloseTray()     : Close a CD Tray
cdioGetDriveLetters : Get CD drive letters
cdioOpen()          : Get a handle for CD
cdioClose()         : Close a handle for CD
cdioExecScsiCmd     : Execute SCSI Multimedia commands

    new file:   system/cdio-test.c
    new file:   system/cdio.c
    new file:   system/cdio.h
fat32io: I/O functions for FAT32

fat32ioOpen()         : Get a handle for FAT32 I/O
fat32ioClose()        : Close a handle
fat32ioInitSectorIO() : Use into sector I/O mode instead of byte I/O mode
fat32ioReadSectors()  : Read sectors
fat32ioWriteSectors() : Write sectors
fat32ioLock()         : Lock FAT32 drive
fat32ioUnlock()       : Unlock FAT32 drive

    new file:   system/fat32io-test.c
    new file:   system/fat32io.c
    new file:   system/fat32io.h