added arduino nfcReader files (#42)

Arduino/nfcReader/NDEF/MifareUltralight.h

@@ -0,0 +1,28 @@
+#ifndef MifareUltralight_h
+#define MifareUltralight_h
+
+#include <PN532.h>
+#include <NfcTag.h>
+#include <Ndef.h>
+
+class MifareUltralight
+{
+    public:
+        MifareUltralight(PN532& nfcShield);
+        ~MifareUltralight();
+        NfcTag read(byte *uid, unsigned int uidLength);
+        boolean write(NdefMessage& ndefMessage, byte *uid, unsigned int uidLength);
+        boolean clean();
+    private:
+        PN532* nfc;
+        unsigned int tagCapacity;
+        unsigned int messageLength;
+        unsigned int bufferSize;
+        unsigned int ndefStartIndex;
+        boolean isUnformatted();
+        void readCapabilityContainer();
+        void findNdefMessage();
+        void calculateBufferSize();
+};
+
+#endif