Added extra example to show serial on lcd display

examples/cardRead/cardRead.ino

@@ -5,7 +5,7 @@
 * MISO: Pin 12 / ICSP-1
 * SCK: Pin 13 / ISCP-3
 * SS: Pin 10
-* RST: Pin 5
+* RST: Pin 9
 *
 * Script is based on the script of Miguel Balboa. 
 * New cardnumber is printed when card has changed. Only a dot is printed
@@ -20,7 +20,7 @@
 #include <RFID.h>
 
 #define SS_PIN 10
-#define RST_PIN 5
+#define RST_PIN 9
 
 RFID rfid(SS_PIN, RST_PIN); 
 
@@ -50,6 +50,7 @@ void loop()
                 && rfid.serNum[3] != serNum3
                 && rfid.serNum[4] != serNum4
             ) {
+                /* With a new cardnumber, show it. */
                 Serial.println(" ");
                 Serial.println("Card found");
                 serNum0 = rfid.serNum[0];
@@ -84,6 +85,7 @@ void loop()
 		Serial.print(rfid.serNum[4],HEX);
                 Serial.println(" ");
              } else {
+               /* If we have the same ID, just write a dot. */
                Serial.print(".");
              }
           }