Add some initial client stuff

src/Client.h

@@ -0,0 +1,28 @@
+#include "MoveOnlyFunction.h"
+
+namespace uWS {
+
+    struct WebSocketClientBehavior {
+        MoveOnlyFunction<void()> open;
+        MoveOnlyFunction<void()> message;
+        MoveOnlyFunction<void()> close;
+    };
+
+    struct Client {
+
+        Client(WebSocketClientBehavior &&behavior) {
+            
+        }
+
+        Client &&connect(std::string url) {
+
+            return std::move(*this);
+        }
+
+        void run() {
+
+        }
+
+    };
+
+}