Moving includes from h to cpp

ampel-firmware/util.cpp

 #include "util.h"
+#include "sensor_console.h"
+#include "config.h"
+#include "sensor_console.h"
+#include <WiFiUdp.h> // required for NTP
+#include "src/lib/NTPClient-master/NTPClient.h" // NTP
 
 namespace config {
   const char *ntp_server = NTP_SERVER;

ampel-firmware/util.h

 #ifndef AMPEL_UTIL_H_INCLUDED
 #define AMPEL_UTIL_H_INCLUDED
-#include <Arduino.h>
-#include "config.h"
-#include "sensor_console.h"
-
-#include <WiFiUdp.h> // required for NTP
-#include "src/lib/NTPClient-master/NTPClient.h" // NTP
 
 #if defined(ESP8266)
 #  include <ESP8266WiFi.h> // required to get MAC address