0. its alpha version!!!

1. commands changed from "hf 14a" to "hf mf" 
2. some code cleaning and small bugfixes
3. alpha version hf mf sim
4. added internal function GetTickCount() for time measuring

armsrc/apps.h

@@ -33,6 +33,8 @@ void DbpString(char *str);
 void Dbprintf(const char *fmt, ...);
 void Dbhexdump(int len, uint8_t *d);
 
+int AvgAdc(int ch);
+
 void ToSendStuffBit(int b);
 void ToSendReset(void);
 void ListenReaderField(int limit);