Merge pull request #5302 from nicolasnoble/python-windows

BUILD

Makefile

binding.gyp

build.yaml

gRPC.podspec

grpc.gemspec

package.json

src/python/grpcio/grpc_core_dependencies.py

templates/vsprojects/vcxproj.filters_defs.include

templates/vsprojects/vcxproj_defs.include

tools/doxygen/Doxyfile.core.internal

tools/run_tests/artifact_targets.py

tools/run_tests/build_artifact_python.bat

tools/run_tests/sources_and_headers.json

vsprojects/buildtests_c.sln

vsprojects/grpc.sln

vsprojects/vcxproj/grpc/grpc.vcxproj

vsprojects/vcxproj/grpc/grpc.vcxproj.filters

vsprojects/vcxproj/grpc_dll/grpc_dll.vcxproj

vsprojects/vcxproj/grpc_dll/grpc_dll.vcxproj.filters