add LZ4 as supported format in README
@@ -50,7 +50,7 @@ Apache Commons Compress
Apache Commons Compress software defines an API for working with
compression and archive formats. These include: bzip2, gzip, pack200,
-lzma, xz, Snappy, traditional Unix Compress, DEFLATE and ar, cpio,
+lzma, xz, Snappy, traditional Unix Compress, DEFLATE, LZ4 and ar, cpio,
jar, tar, zip, dump, 7z, arj.
Documentation
