Merge branch 'master' into uv_core_transport

BUILD

CMakeLists.txt

Makefile

binding.gyp

build.yaml

config.m4

doc/PROTOCOL-HTTP2.md

doc/core/pending_api_cleanups.md

examples/ruby/route_guide/route_guide_client.rb

examples/ruby/route_guide/route_guide_server.rb

gRPC-Core.podspec

grpc.gemspec

include/grpc++/create_channel_posix.h

include/grpc++/ext/reflection.grpc.pb.h

include/grpc++/ext/reflection.pb.h

include/grpc++/server.h

include/grpc/grpc_posix.h

include/grpc/impl/codegen/grpc_types.h

package.xml

src/compiler/cpp_generator.h