Merge branch 'master' into poll_stat

.github/ISSUE_TEMPLATE.md

Makefile

Rakefile

binding.gyp

build.yaml

include/grpc/impl/codegen/grpc_types.h

include/grpc/impl/codegen/port_platform.h

package.json

setup.py

src/compiler/cpp_generator.cc

src/core/ext/filters/client_channel/client_channel.c

src/core/ext/filters/client_channel/lb_policy.h

...core/ext/filters/client_channel/lb_policy/grpclb/grpclb.c

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

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

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

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

src/core/ext/transport/cronet/transport/cronet_transport.c

src/core/lib/http/httpcli.c

src/core/lib/iomgr/port.h