Merge github.com:grpc/grpc into signal_handler

BUILD

Makefile

binding.gyp

build.yaml

composer.json

config.m4

examples/cpp/helloworld/Makefile

examples/cpp/helloworld/greeter_async_client.cc

examples/cpp/helloworld/greeter_async_client2.cc

examples/csharp/helloworld/generate_protos.bat

examples/csharp/route_guide/generate_protos.bat

examples/node/README.md

examples/node/dynamic_codegen/README.md

examples/node/dynamic_codegen/greeter_client.js

examples/node/dynamic_codegen/greeter_server.js

examples/node/dynamic_codegen/route_guide/README.md

...es/node/dynamic_codegen/route_guide/route_guide_client.js

...ples/node/dynamic_codegen/route_guide/route_guide_db.json

...es/node/dynamic_codegen/route_guide/route_guide_server.js

examples/node/package.json