* src/css.c, src/device.c, src/ioctl.[ch]: We don't need to be in administrator mode
anymore to authenticate the drive on Windows NT/2k/XP. As a result any user can now
play a DVD on these OSs :)
* src/ioctl.c: fixed ioctl_ReadTitleKey which wasn't working on Windows NT/2k/XP.
Because of this bug, the disc and key methods for key decryption where not working.