Add support for rev3 of the Atom47 (#2672)

* Added support for rev3 of the Atom47

* Updated Atom47 readme's

* Fix redefine error on rev2 and add maartenwut's keymap

* Fix redefine error on LEdiodes keymap

keyboards/atom47/readme.md

@@ -1,28 +1,26 @@
-# ATOM47
+# Atom47
 
-![ATOM47](https://i.imgur.com/rjrFTKT.png)
+![Atom47](https://i.imgur.com/Wwflqvt.png)
 
 ## Support
-Keyboard Maintainer: [Matthew Kerfoot(https://github.com/mkerfoot)  
-Hardware Supported: ATOM47  
+Keyboard Maintainer: [Maarten Dekkers(https://github.com/maartenwut)  
+Hardware Supported: Atom47 rev3
 Hardware Availability: [GeekHack.com Group Buy](https://geekhack.org/index.php?topic=93447.msg2545221)  
 
 
 ## Features
-QMK Firmware
-6 Underglow RGB leds
-In-switch leds
-Through-hole micro usb connector (less likely to break off!)
-South facing leds for the QMX/Zealencio users
-Multiple layouts
-Easily reachable reset button under the spacebar
-CapsLock indicator
+- QMK Firmware  
+- 6 Underglow RGB leds  
+- In-switch leds  
+- Through-hole micro usb connector (less likely to break off!)  
+- South facing leds for the QMX/Zealencio users  
+- Multiple layouts  
+- Easily reachable reset button under the spacebar  
+- CapsLock indicator  
 
 ## Build
 To build the default keymap, simply run `make atom47:default`.
 
-For an alternative, heavily modified layout you would just need to run `make atom47:LEdiodes`.
-
 See [build environment setup](https://docs.qmk.fm/build_environment_setup.html) then the [make instructions](https://docs.qmk.fm/make_instructions.html) for more information.
 
-![ATOM47](https://i.imgur.com/WebeUOF.png)
+![Atom47](https://i.imgur.com/JfYnOba.jpg)