Merge branch 'master' into new_tsi

.gitignore

BUILD

CMakeLists.txt

Makefile

PYTHON-MANIFEST.in

README.md

WORKSPACE

bazel/BUILD

bazel/cc_grpc_library.bzl

bazel/generate_cc.bzl

bazel/grpc_build_system.bzl

binding.gyp

build.yaml

config.m4

doc/binary-logging.md

doc/interop-test-descriptions.md

doc/server_side_auth.md

doc/service_config.md

examples/cpp/README.md

examples/cpp/cpptutorial.md