Log Message:
Updated zstd to 1.1.1.

v1.1.1
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