Update klipper expander menuconfig items and clarify what's required to be configured. Add note about errors (#241)

* -update menuconfig images to reflect updated configuration items in klipper firmware
-Add comment about not configuring `USB ids` (appears not to be needed)
-Borrow content from V0 display repo about the error after flashing being OK

* add files that were supposed to be added in last commit

Author: mattjm

Klipper_Expander/Documentation/Setup_and_Flashing_Guide.md

@@ -17,7 +17,8 @@
 7) Run `make menuconfig` settings should be:
 
 	<img src="../Images/Menuconfig_Base_Options.png" width="1000">
-
+	
+	- Do not configure `USB ids`
 	- Set the "Optional features" to:
 
 	<img src="../Images/Menuconfig_Optional_Options.png" width="1000">
@@ -28,6 +29,11 @@
 
 9) Run `make flash FLASH_DEVICE=xxxx:yyyy` (using xxxx:yyyy from above)
 
+    - You may see what appears to be an "error" after flashing your board. (Blue box)
+	- As long as you see the `File downloaded successfully` text (Green box) you are good to proceed.
+ 	- The error (Red box) seems to be caused by the controller immediately running the uploaded code and no longer appearing as a DFU device. This is not an issue, as long as the board reports a Klipper serial name.
+		<img src="../Images/dfu-util_Flashing_Error.png" width="500">
+
 10) Remove the boot jumper and press the reset button.
 
 11) After completion `ls /dev/serial/by-id/*` should return a device begining with `/dev/serial/by-id/usb-Klipper_stm32f042x6...`