minimal deflate implementation

based on:
	rfc1951 from ietf
	zlib
	puff from zlib
	gzip
	tinf from ibsensoftware
	libflate from plan 9
	deflate from halibut
	sshzlib from putty
	deflateencoder from 7zip

build:
	make

usage:
	sflate [-q|-v] [-c|-d] [-r|-g|-z|-p] <in >out

	-q quiet (default)
	-v verbose
	-c compress (default)
	-d decompress
	-r raw (default)
	-g gzip
	-z zlib
	-p pkzip

files:
	adler.c: adler32 checksum
	crc.c: crc32 checksum
	deflate.c: raw deflate compression
	inflate.c: raw deflate decompression
	inflate_simple.c: minimal inflate implementation for reference
	sflate.c: deflate, zlib, gzip, pkzip stream compression