Refactored gateway config files

Refactored fdrs_config.h to fdrs_gateway_config.h
This way it is directly visible from within a folder, what the config is for.

FDRS_Gateway/FDRS_Gateway.ino

@@ -5,7 +5,7 @@
 //  Developed by Timm Bogner (timmbogner@gmail.com) for Sola Gratia Farm in Urbana, Illinois, USA.
 //
 
-#include "fdrs_config.h"
+#include "fdrs_gateway_config.h"
 #ifdef ESP8266
 #include <ESP8266WiFi.h>
 #include <espnow.h>

examples/Full_System_Example/3_ESPNOW_Gateway/3_ESPNOW_Gateway.ino

@@ -5,7 +5,7 @@
 //  Developed by Timm Bogner (timmbogner@gmail.com) for Sola Gratia Farm in Urbana, Illinois, USA.
 //
 
-#include "fdrs_config.h"
+#include "fdrs_gateway_config.h"
 #ifdef ESP8266
 #include <ESP8266WiFi.h>
 #include <espnow.h>

examples/Full_System_Example/4_UART_Gateway/4_UART_Gateway.ino

@@ -5,7 +5,7 @@
 //  Developed by Timm Bogner (timmbogner@gmail.com) for Sola Gratia Farm in Urbana, Illinois, USA.
 //
 
-#include "fdrs_config.h"
+#include "fdrs_gateway_config.h"
 #ifdef ESP8266
 #include <ESP8266WiFi.h>
 #include <espnow.h>

examples/Full_System_Example/5_MQTT_Gateway/5_MQTT_Gateway.ino

@@ -5,7 +5,7 @@
 //  Developed by Timm Bogner (timmbogner@gmail.com) for Sola Gratia Farm in Urbana, Illinois, USA.
 //
 
-#include "fdrs_config.h"
+#include "fdrs_gateway_config.h"
 #ifdef ESP8266
 #include <ESP8266WiFi.h>
 #include <espnow.h>

examples/Universal_Gateway_beta/Universal_Gateway_beta.ino

@@ -5,13 +5,13 @@
 //  Under construction, feedback is appreciated!
 //
 
-#include "fdrs_config.h"
+#include "fdrs_gateway_config.h"
 
 #ifdef USE_LED
 #include <FastLED.h>
 #endif
 #include "fdrs_gateway.h"
-#include "fdrs_config.h"
+#include "fdrs_gateway_config.h"
 
 #ifdef USE_LED
 CRGB leds[NUM_LEDS];