Merge github.com:grpc/grpc into error

BUILD

Makefile

binding.gyp

build.yaml

config.m4

doc/interop-test-descriptions.md

gRPC.podspec

grpc.def

grpc.gemspec

include/grpc++/create_channel_posix.h

include/grpc++/grpc++.h

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

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

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

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

include/grpc++/impl/grpc_library.h

include/grpc++/server.h

include/grpc++/server_builder.h

include/grpc++/server_posix.h

include/grpc/compression.h