Merge branch 'master' into make_clang_great_again_v2

BUILD

CONTRIBUTING.md

INSTALL.md

Makefile

build.yaml

examples/cpp/helloworld/README.md

examples/node/package.json

examples/ruby/route_guide/route_guide_client.rb

gRPC.podspec

grpc.gemspec

include/grpc++/alarm.h

include/grpc++/channel.h

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

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

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

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

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

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

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

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