Lempel-Ziv Encoding functions
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 CopyLZFile        Copies files and decompresses them if compressed
 GetExpandedName   Retrieves the original filename of a compressed file
 LZClose           Closes a file
 LZCopy            Copies a file and decompresses it if compressed
 LZDone            Frees buffers allocated by the LZStart function
 LZInit            Initializes structures needed for decompression
 LZOpenFile        Opens a file (both compressed and uncompressed)
 LZRead            Reads a specified number of bytes from a compressed file
 LZSeek            Repositions a pointer in a file
 LZStart           Allocates buffers for the CopyLZFile function