Adding Windows tcp server code.
diff --git a/vsprojects/vs2013/grpc.vcxproj b/vsprojects/vs2013/grpc.vcxproj
index 10c8472..6d79178 100644
--- a/vsprojects/vs2013/grpc.vcxproj
+++ b/vsprojects/vs2013/grpc.vcxproj
@@ -289,6 +289,8 @@
</ClCompile>
<ClCompile Include="..\..\src\core\iomgr\tcp_server_posix.c">
</ClCompile>
+ <ClCompile Include="..\..\src\core\iomgr\tcp_server_windows.c">
+ </ClCompile>
<ClCompile Include="..\..\src\core\iomgr\tcp_windows.c">
</ClCompile>
<ClCompile Include="..\..\src\core\iomgr\time_averaged_stats.c">