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

CMakeLists.txt

Makefile

binding.gyp

build.yaml

config.m4

gRPC-Core.podspec

grpc.gemspec

include/grpc/impl/codegen/grpc_types.h

include/grpc/support/workaround_list.h

package.xml

...ilters/workarounds/workaround_cronet_compression_filter.c

...ilters/workarounds/workaround_cronet_compression_filter.h

src/core/ext/filters/workarounds/workaround_utils.c

src/core/ext/filters/workarounds/workaround_utils.h

src/core/plugin_registry/grpc_plugin_registry.c

src/core/plugin_registry/grpc_unsecure_plugin_registry.c

src/python/grpcio/grpc_core_dependencies.py

test/core/end2end/end2end_nosec_tests.c

test/core/end2end/end2end_tests.c

test/core/end2end/end2end_tests.h