v1.9.0
Windows: create import library with gcc directly, remove now useless def file
lz4 version source from lz4.h
added a few dates
Allow installation of lz4 for Windows 10 with MSYS2
updated doc to underline difference between block and frame
simplified output_directive
decompress*_fast() function do not generate deprecation warnings
ensure consistent definition and usage of FREEMEM
Integrate lz4frame_static.h Declarations into lz4frame.h
added versions in comments
updated xxhash to latest version