Update brotli to v1.0.0-snapshot.

third_party/brotli/README.md

-brotli
-======
+### 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 the
-following internet draft:
-http://www.ietf.org/id/draft-alakuijala-brotli
+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 && 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 && \
+      cmake .. -DBUILD_SHARED_LIBS=0 -DCMAKE_INSTALL_PREFIX='/my/install/dir/'
+    $ make install
+
+#### Premake5
+
+See [Premake5](https://premake.github.io/)
+
+#### Python
+
+The basic commands to build, test, and install the Python module are:
+
+    $ python setup.py build test
+    $ python setup.py install
+
+See the [Python readme](python/README.md) for more details.
+
+### 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`