Merge pull request #1454 from nicolasnoble/win32-fixes

src/compiler/cpp_generator.cc

src/core/iomgr/iocp_windows.c

src/core/iomgr/socket_windows.c

src/core/iomgr/socket_windows.h

src/core/iomgr/tcp_client_windows.c

src/core/iomgr/tcp_server_windows.c

src/core/iomgr/tcp_windows.c

vsprojects/openssl.props

vsprojects/zlib.props