Zstd

API : streaming : decompression : changed : automatic implicit reset when chain-decoding new frames without init
API : experimental : added : dictID retrieval functions, and ZSTD_initCStream_srcSize()
API : zbuff : changed : prototypes now generate deprecation warnings
lib : improved : faster decompression speed at ultra compression settings and 32-bits mode
lib : changed : only public ZSTD_ symbols are now exposed
lib : changed : reduced usage of stack memory
lib : fixed : several corner case bugs, by Nick Terrell
cli : new : gzstd, experimental version able to decode .gz files, by Przemyslaw Skibinski
cli : new : preserve file attributes
cli : new : added zstdless and zstdgrep tools
cli : fixed : status displays total amount decoded, even for file consisting of multiple frames (like pzstd)
cli : fixed : zstdcat
zlib_wrapper : added support for gz* functions, by Przemyslaw Skibinski
install : better compatibility with FreeBSD, by Dimitry Andric
source tree : changed : zbuff source files moved to lib/deprecated

New : command -M, --memory=, --memlimit=, --memlimit-decompress= to limit allowed memory consumption
New : doc/zstd_manual.html, by Przemyslaw Skibinski
Improved : slightly better compression ratio at --ultra levels (>= 20)
Improved : better memory usage when using streaming compression API, thanks to Rogier-5 report
Added : API : ZSTD_initCStream_usingCDict(), ZSTD_initDStream_usingDDict() (experimental section)
Added : example/multiple_streaming_compression.c
Changed : zstd_errors.h is now installed within /include (and replaces errors_public.h)
Updated man page
Fixed : zstd-small, zstd-compress and zstd-decompress compilation targets

New : contrib/pzstd, parallel version of zstd, by Nick Terrell
added : NetBSD install target (338)
Improved : speed for batches of small files
Improved : speed of zlib wrapper, by Przemyslaw Skibinski
Changed : libzstd on Windows supports legacy formats, by Christophe Chevalier
Fixed : CLI -d output to stdout by default when input is stdin (322)
Fixed : CLI correctly detects console on Mac OS-X
Fixed : CLI supports recursive mode `-r` on Mac OS-X
Fixed : Legacy decoders use unified error codes, reported by benrg (341), fixed by Przemyslaw Skibinski
Fixed : compatibility with OpenBSD, reported by Juan Francisco Cantero Hurtado (319)
Fixed : compatibility with Hurd, by Przemyslaw Skibinski (365)
Fixed : zstd-pgo, reported by octoploid (329)

Change Licensing, all project is now BSD, Copyright Facebook
Small decompression speed improvement
API : Streaming API supports legacy format
API : ZDICT_getDictID(), ZSTD_sizeof_{CCtx, DCtx, CStream, DStream}(), ZSTD_setDStreamParameter()

New streaming API
Changed : --ultra now enables levels beyond 19
Changed : -i now selects benchmark time in second
Fixed : ZSTD_compress* can now compress > 4 GB in a single pass, reported by Nick Terrell
Fixed : speed regression on specific patterns (272)
Fixed : support for Z_SYNC_FLUSH, by Dmitry Krot (291)
Fixed : ICC compilation, by Przemyslaw Skibinski

Improved : better speed on clang and gcc -O2, thanks to Eric Biggers
New : Build on FreeBSD and DragonFly, thanks to JrMarino
Changed : modified API : ZSTD_compressEnd()
Fixed : legacy mode with ZSTD_HEAPMODE=0, by Christopher Bergqvist
Fixed : premature end of frame when zero-sized raw block, reported by Eric Biggers
Fixed : large dictionaries (> 384 KB), reported by Ilona Papava
Fixed : checksum correctly checked in single-pass mode
Fixed : combined --test amd --rm, reported by Andreas M. Nilsson
Modified : minor compression level adaptations