Merge github.com:grpc/grpc into c++lame

BUILD

Makefile

bazel/cc_grpc_library.bzl

bazel/generate_cc.bzl

bazel/grpc_build_system.bzl

build.yaml

doc/g_stands_for.md

include/grpc++/impl/codegen/proto_utils.h

include/grpc++/test/mock_stream.h

src/compiler/cpp_generator.cc

src/compiler/cpp_generator.h

src/compiler/cpp_plugin.cc

src/core/ext/filters/client_channel/subchannel.c

src/core/lib/channel/connected_channel.c

src/core/lib/iomgr/udp_server.c

src/core/lib/security/transport/client_auth_filter.c

src/core/lib/support/avl.c

src/core/lib/surface/version.c

src/proto/grpc/testing/BUILD

src/proto/grpc/testing/compiler_test.proto