Merge github.com:grpc/grpc into server_start

BUILD

CMakeLists.txt

Makefile

binding.gyp

build.yaml

config.m4

examples/csharp/helloworld-from-cli/global.json

gRPC-Core.podspec

grpc.gemspec

include/grpc/impl/codegen/grpc_types.h

package.xml

src/core/ext/transport/chttp2/transport/chttp2_transport.c

src/core/ext/transport/chttp2/transport/frame_data.c

src/core/ext/transport/chttp2/transport/frame_data.h

src/core/ext/transport/chttp2/transport/frame_settings.c

src/core/ext/transport/chttp2/transport/frame_settings.h

src/core/ext/transport/chttp2/transport/hpack_encoder.c

src/core/ext/transport/chttp2/transport/hpack_encoder.h

src/core/ext/transport/chttp2/transport/hpack_parser.c

src/core/ext/transport/chttp2/transport/http2_settings.c