Merge pull request #253 from makermelissa/master

A couple board info fixes for my guide

_blinka/raspberry_pi_cm3lite.md

@@ -1,11 +1,11 @@
 ---
 layout: download
-board_id: "raspberry_pi_cm3lite.md"
+board_id: "raspberry_pi_cm3lite"
 title: "Raspberry Pi Compute Module 3 Lite Download"
 name: "Raspberry Pi Compute Module 3 Lite"
 manufacturer: "Raspberry Pi Foundation"
 board_url: "https://www.raspberrypi.org/products/compute-module-3/"
-board_image: "raspberry_pi_cm3lite.md.jpg"
+board_image: "raspberry_pi_cm3lite.jpg"
 download_instructions: "https://learn.adafruit.com/circuitpython-on-raspberrypi-linux/installing-circuitpython-on-raspberry-pi"
 downloads_display: true
 blinka: true

_board/feather_m4_express.md

@@ -4,7 +4,7 @@ board_id: "feather_m4_express"
 title: "Feather M4 Express Download"
 name: "Feather M4 Express"
 manufacturer: "Adafruit"
-board_url: "https://www.adafruit.com"
+board_url: "https://www.adafruit.com/product/3857"
 board_image: "feather_m4_express.jpg"
 features:
   - Feather-compatible
@@ -26,3 +26,7 @@ Comes fully assembled and tested, with the UF2 USB bootloader. We also toss in s
 ## Purchase
 * [Adafruit](https://www.adafruit.com/product/3857)
 * [Digi-Key](https://www.digikey.com/short/p87f17)
+
+## Contribute
+
+Have some info to add for this board? Edit the source for this page [here](https://github.com/adafruit/circuitpython-org/edit/master/_board/{{ page.board_id }}.md).

_board/unknown.md

@@ -2,6 +2,7 @@
 layout: download
 board_id: "unknown"
 title: "Unknown Board Download"
+name: "Unknown Board"
 manufacturer: "Unknown"
 board_url: ""
 board_image: "unknown.jpg"