ZSTD_decodingBufferSize_min()

supporting function for bufferless streaming API (ZSTD_decompressContinue())
makes it possible to correctly size a round buffer for decoding using this API.

also : added field blockSizeMax within ZSTD_frameHeader,
as it's a necessary information to know when to restart at beginning of decoding buffer.

zlibWrapper/Makefile

@@ -34,7 +34,7 @@ EXT =
 endif
 
 
-all: clean fitblk example zwrapbench minigzip
+all: fitblk example zwrapbench minigzip
 
 test: example fitblk example_zstd fitblk_zstd zwrapbench minigzip minigzip_zstd
 	./example