added info about lz4 deps:   ../README.md
	lz4 added:   CMakeLists.txt
	lz4 is handled internal:   epk.c
	new file:   lz4/CMakeLists.txt
	new file:   lz4/Makefile.lz4
	new file:   lz4/bench.c
	new file:   lz4/bench.h
	new file:   lz4/lz4.c
	new file:   lz4/lz4.h
	new file:   lz4/lz4_format_description.txt
	new file:   lz4/lz4demo.c
	new file:   lz4/lz4hc.c
	new file:   lz4/lz4hc.h
	obsolete:    lz4pack
	lz4 is handled internal:   main.c