Major changes, including Brotli and Lizard

- update of zstd-mt library
- add brotli v0.6.0
- add lizard v2.0
- xxhash is from zstd for lz4, lz5 and lizard now
- update also the documentation, where needed

C/brotli/README.md

@@ -0,0 +1,71 @@
+<p align="center"><img src="https://brotli.org/brotli.svg" alt="Brotli" width="64"></p>
+
+### Introduction
+
+Brotli is a generic-purpose lossless compression algorithm that compresses data
+using a combination of a modern variant of the LZ77 algorithm, Huffman coding
+and 2nd order context modeling, with a compression ratio comparable to the best
+currently available general-purpose compression methods. It is similar in speed
+with deflate but offers more dense compression.
+
+The specification of the Brotli Compressed Data Format is defined in [RFC 7932](https://www.ietf.org/rfc/rfc7932.txt).
+
+Brotli is open-sourced under the MIT License, see the LICENSE file.
+
+Brotli mailing list:
+https://groups.google.com/forum/#!forum/brotli
+
+[![Build Status](https://travis-ci.org/google/brotli.svg?branch=master)](https://travis-ci.org/google/brotli)
+
+### Build instructions
+
+#### Make
+
+To build and run tests, simply do:
+
+    $ ./configure && make
+
+If you want to install brotli, use one of the more advanced build systems below.
+
+#### Bazel
+
+See [Bazel](http://www.bazel.build/)
+
+#### CMake
+
+The basic commands to build, test and install brotli are:
+
+    $ mkdir out && cd out && ../configure-cmake && make
+    $ make test
+    $ make install
+
+You can use other [CMake](https://cmake.org/) configuration. For example, to
+build static libraries and use a custom installation directory:
+
+    $ mkdir out-static && \
+      cd out-static && \
+      ../configure-cmake --disable-shared-libs --prefix='/my/prefix/dir/'
+    $ make install
+
+#### Premake5
+
+See [Premake5](https://premake.github.io/)
+
+#### Python
+
+To install the Python module from source, run the following:
+
+    $ python setup.py install
+
+See the [Python readme](python/README.md) for more details on testing
+and development.
+
+### Benchmarks
+* [Squash Compression Benchmark](https://quixdb.github.io/squash-benchmark/) / [Unstable Squash Compression Benchmark](https://quixdb.github.io/squash-benchmark/unstable/)
+* [Large Text Compression Benchmark](http://mattmahoney.net/dc/text.html)
+* [Lzturbo Benchmark](https://sites.google.com/site/powturbo/home/benchmark)
+
+### Related projects
+Independent [decoder](https://github.com/madler/brotli) implementation by Mark Adler, based entirely on format specification.
+
+JavaScript port of brotli [decoder](https://github.com/devongovett/brotli.js). Could be used directly via `npm install brotli`