add example websocket C++ server snake which supports basic cobra ops (publish and subscribe without stream sql

ws/snake/IXSnakeProtocol.h

@@ -0,0 +1,26 @@
+/*
+ *  IXSnakeProtocol.h
+ *  Author: Benjamin Sergeant
+ *  Copyright (c) 2019 Machine Zone, Inc. All rights reserved.
+ */
+
+#pragma once
+
+#include <memory>
+
+namespace ix
+{
+    class WebSocket;
+}
+
+namespace snake
+{
+    class SnakeConnectionState;
+    struct AppConfig;
+
+    void processCobraMessage(
+        std::shared_ptr<SnakeConnectionState> state,
+        std::shared_ptr<ix::WebSocket> ws,
+        const AppConfig& appConfig,
+        const std::string& str);
+}