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

.gitignore

BUILD

CMakeLists.txt

INSTALL.md

Makefile

binding.gyp

build.yaml

config.m4

examples/cpp/helloworld/CMakeLists.txt

...les/objective-c/auth_sample/Misc/GoogleService-Info.plist

gRPC-Core.podspec

grpc.def

grpc.gemspec

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/core_codegen.h

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

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

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