Merge github.com:grpc/grpc into bye-bye-completion-queue-pie

INSTALL

Makefile

build.json

include/grpc/support/tls.h

include/grpc/support/tls_msvc.h

src/core/iomgr/iocp_windows.c

src/core/iomgr/tcp_client_windows.c

templates/Makefile.template

templates/vsprojects/Grpc.mak.template

templates/vsprojects/generate_debug_projects.sh

templates/vsprojects/gpr/gpr.vcxproj.filters.template

templates/vsprojects/gpr/gpr.vcxproj.template

...s/vsprojects/gpr_test_util/gpr_test_util.vcxproj.template

templates/vsprojects/grpc++/grpc++.vcxproj.filters.template

templates/vsprojects/grpc++/grpc++.vcxproj.template

.../grpc++_unsecure/grpc++_unsecure.vcxproj.filters.template

...projects/grpc++_unsecure/grpc++_unsecure.vcxproj.template

templates/vsprojects/grpc/grpc.vcxproj.filters.template

templates/vsprojects/grpc/grpc.vcxproj.template

...projects/grpc_csharp_ext/grpc_csharp_ext.vcxproj.template