Zstandard v1.3.0

cli : new : --list command, by @paulcruz74
cli : changed : xz/lzma support enabled by default
cli : changed : -t * continue processing list after a decompression error
API : added : ZSTD_versionString()
API : promoted to stable status : ZSTD_getFrameContentSize(), by @iburinoc
API exp : new advanced API : ZSTD_compress_generic(), ZSTD_CCtx_setParameter()
API exp : new : API for static or external allocation : ZSTD_initStatic?Ctx()
API exp : added : ZSTD_decompressBegin_usingDDict(), requested by @Crazee (#700)
API exp : clarified memory estimation / measurement functions.
API exp : changed : strongest strategy renamed ZSTD_btultra, fastest strategy ZSTD_fast set to 1
Improved : reduced stack memory usage, by @terrelln and @stellamplau
tools : decodecorpus can generate random dictionary-compressed samples, by @paulcruz74
new : contrib/seekable_format, demo and API, by @iburinoc
changed : contrib/linux-kernel, updated version and license, by @terrelln