move wifi stuff to separate module, implement WifiManager for AP configuration

99_setup_loop.ino

@@ -24,7 +24,8 @@ void setup() {
   settings.name.remove(devlen+1, 6);
 
   PRINTLN_SERIAL("device name generated");
-    
+
+  wifi_setup();
 
 #ifdef ENABLE_MQTT
   mqtt_setup();
@@ -40,6 +41,7 @@ void setup() {
 }
 
 void loop() {
+  wifi_loop();
 #ifdef ENABLE_MQTT
   mqtt_loop();
 #endif