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

ixwebsocket/IXSocket.cpp

@@ -232,19 +232,28 @@ namespace ix
     bool Socket::writeBytes(const std::string& str,
                             const CancellationRequest& isCancellationRequested)
     {
+        char* buffer = const_cast<char*>(str.c_str());
+        int len = (int) str.size();
+
         while (true)
         {
             if (isCancellationRequested && isCancellationRequested()) return false;
 
-            char* buffer = const_cast<char*>(str.c_str());
-            int len = (int) str.size();
-
             ssize_t ret = send(buffer, len);
 
             // We wrote some bytes, as needed, all good.
             if (ret > 0)
             {
-                return ret == len;
+                if (ret == len)
+                {
+                    return true;
+                }
+                else
+                {
+                    buffer += ret;
+                    len -= ret; 
+                    continue;
+                }
             }
             // There is possibly something to be writen, try again
             else if (ret < 0 && Socket::isWaitNeeded())