Zstandard v0.7.1

v0.7.1
fixed : ZBUFF_compressEnd() called multiple times with too small dst buffer, reported by @KrzysFR
fixed : dictBuilder fails if first sample is too small, reported by @velavokr
fixed : corruption issue, reported by cj
modified : frame checksum enabled by default in command line mode (can be disabled with --no-check)
fixed : cli breaks during destination file overwrite confirmation

v0.7.0
Candidate compression format
New : Support for directory compression, using -r, thanks to @inikep
New : Command --rm, to remove source file after successful de/compression
New : Visual build scripts, by @KrzysFR
New : Support for Sparse File-systems (do not use space for zero-filled sectors)
New : Frame checksum support
New : Support pass-through mode (when using -df)
API : more efficient Dictionary API : ZSTD_compress_usingCDict(), ZSTD_decompress_usingDDict()
API : create dictionary files from custom content, by @ot
API : support for custom malloc/free functions
New : controllable Dictionary ID
New : Support for skippable frames
Changed : removed zstd_static.h, now replaced by a #define ZSTD_STATIC_LINKING_ONLY before #include zstd.h. Same logic for all others *_static.h.