HTTP bodies should work nicely, files are reorganised, www is reverted

src/Helpers.cpp

@@ -27,7 +27,8 @@ std::string Helpers::GenerateResponse(std::string statusCode,
                                       std::string content) {
   std::stringstream output;
   output << "HTTP/1.1 " << statusCode << "\n"
-         << "Content-Type: " << contentType << "\nConnection: close\n\n"
+         << "Content-Type: " << contentType
+         << "\nContent-Length: " << content.size() << "\nConnection: close\n\n"
          << content;
   return output.str();
 }