[Release] cfs header & child format

Header:
		char signature 			[8];
		unsigned int version	        [4];
		unsigned int files		[4];
		char reserve   			[4];

Compression:
		LZMA  -> 7zip
		uint8 {1}   - LZMA decoder properties size
		byte {X}    - LZMA decoder properties bytes (typically 5 bytes)
		uint32 {4}  - File count

Child:
		// LOOP HERE ( :A ) < filesize
		char {X}    - File name (.NET style string with size byte followed by characters)
		int64 {8}   - File length
		int64 {8}   - Compressed length
		int64 {8}   - File content offset
		uint16 {2}  - Attributes and flags (0: Uncompressed, 1: Compressed)
		// GOTO ( :A )
		
		byte {x}    - File data