CHG: generic code clean up. Removal of commented code.

CHG: USB_CMD_DATA_SIZE is now used as maxsize for transfer of data between client and pm3device
CHG: suggested a fix for the underscore problem in ioclass\fileutils.c
ADD:  tnp3xx support
ADD:  nxp tag idents.
ADD:  identifiction of chinese backdoor commands to hf 14a reader.

client/loclass/fileutils.c

@@ -11,8 +11,14 @@
  * @return
  */
 int fileExists(const char *filename) {
+
+#ifdef _WIN32
+	struct _stat st;
+	int result = _stat(filename, &st);
+#else
 	struct stat st;
 	int result = stat(filename, &st);
+#endif
 	return result == 0;
 }