change endian conversion to native to be & be to native

completely deferred xfer isr event to usbd task
complete read10, write10 sequence for large data transfer

demos/device/device_os_none/mscd_app.h

@@ -61,6 +61,11 @@ enum
   DISK_BLOCK_SIZE = 512
 };
 
+#define README_CONTENTS \
+"This is tinyusb's MassStorage Class demo.\r\n\r\n\
+If you find any bugs or get any questions, feel free to file an\r\n\
+issue at github.com/hathach/tinyusb"
+
 #if TUSB_CFG_MCU==MCU_LPC11UXX || TUSB_CFG_MCU==MCU_LPC13UXX
   #define MSCD_APP_ROMDISK
 #else // defaults is ram disk