Fixed issue #33

Added a try catch when trying to convert the string that contains the version number into a float.

server_http.hpp

@@ -762,10 +762,15 @@ namespace SimpleWeb {
                 return;
               }
             }
-            if(std::stof(response->session->request->http_version) >= 1.1) {
-              auto new_session = std::make_shared<Session>(this->config.max_request_streambuf_size, response->session->connection);
-              this->read(new_session);
-              return;
+            
+            try{
+                if(std::stof(response->session->request->http_version) >= 1.1) {
+                  auto new_session = std::make_shared<Session>(this->config.max_request_streambuf_size, response->session->connection);
+                  this->read(new_session);
+                  return;
+                }
+            }catch(const std::exception &){
+                
             }
           }
           else if(this->on_error)