Feature/httpd (#94)

* Stub code for http server

* can send a response, cannot process body yet

* write headers to the response

* remove commented code

* add simple test + set default http handler

* tweak CI + unittest

* add missing file

* rewrite http::trim in a simple way

* doc

ws/ws_httpd.cpp

@@ -0,0 +1,34 @@
+/*
+ *  ws_httpd.cpp
+ *  Author: Benjamin Sergeant
+ *  Copyright (c) 2018 Machine Zone, Inc. All rights reserved.
+ */
+
+#include <iostream>
+#include <vector>
+#include <fstream>
+#include <sstream>
+#include <ixwebsocket/IXHttpServer.h>
+#include <spdlog/spdlog.h>
+
+namespace ix
+{
+    int ws_httpd_main(int port, const std::string& hostname)
+    {
+        spdlog::info("Listening on {}:{}", hostname, port);
+
+        ix::HttpServer server(port, hostname);
+
+        auto res = server.listen();
+        if (!res.first)
+        {
+            std::cerr << res.second << std::endl;
+            return 1;
+        }
+
+        server.start();
+        server.wait();
+
+        return 0;
+    }
+}