Merge branch 'master' into async_thread_stress_test

.gitignore

BUILD

Makefile

Rakefile

binding.gyp

build.yaml

doc/statuscodes.md

examples/cpp/helloworld/Makefile

examples/cpp/helloworld/greeter_async_server.cc

gRPC.podspec

grpc.def

grpc.gemspec

include/grpc++/alarm.h

include/grpc++/channel.h

include/grpc++/client_context.h

include/grpc++/completion_queue.h

include/grpc++/generic/async_generic_service.h

include/grpc++/generic/generic_stub.h

include/grpc++/impl/call.h

include/grpc++/impl/client_unary_call.h