TGCD format. V1.0

Header - "TGCD", 4 bytes.
Version - "0100", 4 bytes.
Reserved - 4 bytes, zero for now.
Tracks - Number of tracks, 1 byte.
Length - LBA, 3 bytes.

TrackInfo
Mode - Data or Audio, 1 byte. 4 for data track.
LBA - Start LBA, 3 bytes.
Pointer - Pointer to data for this track counting from the end of this header. 4 bytes Little Endian.
