Merge branch 'master' of https://github.com/grpc/grpc into cpp_bazelness

examples/ruby/errors_and_cancellation/README.md

...les/ruby/errors_and_cancellation/error_examples_client.rb

...les/ruby/errors_and_cancellation/error_examples_server.rb

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

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

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

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

include/grpc/impl/codegen/grpc_types.h

src/compiler/README.md

src/core/README.md

src/core/ext/census/gen/README.md

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

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

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

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

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

src/core/lib/iomgr/resource_quota.c

src/core/lib/surface/call.c

src/cpp/README.md

src/cpp/client/client_context.cc