Merge branch 'master' into backport-merge

.gitmodules

BUILD

Makefile

README.md

binding.gyp

build.yaml

doc/load-balancing.md

examples/cpp/helloworld/Makefile

examples/cpp/route_guide/Makefile

examples/protos/helloworld.proto

examples/protos/route_guide.proto

gRPC.podspec

grpc.def

grpc.gemspec

include/grpc++/alarm.h

include/grpc++/create_channel.h

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

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

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

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