Merge remote-tracking branch 'upstream/master' into service_config

BUILD

CMakeLists.txt

Makefile

binding.gyp

build.yaml

config.m4

doc/core/pending_api_cleanups.md

examples/php/route_guide/run_route_guide_client.sh

gRPC-Core.podspec

grpc.gemspec

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

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

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

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

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

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

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

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

include/grpc++/server.h

include/grpc++/server_builder.h