Zstandard v1.0

Change Licensing, all project is now BSD, copyright Facebook
Added Patent Grant
Small decompression speed improvement
API : Streaming API supports legacy format
API : New : ZDICT_getDictID(), ZSTD_sizeof_{CCtx, DCtx, CStream, DStream}(), ZSTD_setDStreamParamter()
CLI supports legacy formats v0.4+
Fixed : compression fails on certain huge files, reported by Jesse McGrew
Enhanced documentation, by @inikep