Add documentation to the incomplete Mass Storage class bootloader, update the virtual FAT file entry so that the bootloader section is omitted (not user readable/writable). Fix some minor documentation errors in the Printer class bootloader.

Bootloaders/Printer/BootloaderPrinter.c

@@ -335,7 +335,7 @@ void EVENT_USB_Device_Connect(void)
 }
 
 /** Event handler for the USB_Disconnect event. This indicates that the device is no longer connected to a host via
- *  the status LEDs and stops the Mass Storage management task.
+ *  the status LEDs and stops the Printer management task.
  */
 void EVENT_USB_Device_Disconnect(void)
 {