Update USB-USB converter README according to #1588

keyboards/converter/usb_usb/README.md

@@ -1,77 +1,60 @@
 USB to USB keyboard protocol converter
 ======================================
-Original code from Hasu's TMK firmware. Ported to QMK by Coloneljesus.
+A small device to connect between your USB keyboard and your PC that makes (almost) every keyboard fully programmable.
+Original code from the [TMK firmware](https://github.com/tmk/tmk_keyboard/tree/master/converter/usb_usb). Ported to QMK by [Balz Guenat](https://github.com/BalzGuenat).
 
-This port has been tested only on the Pro Micro variant described in the next section.
+Keyboard Maintainer: [Balz Guenat](https://github.com/BalzGuenat)
+Hardware Supported: [Hasu's USB-USB converter](https://geekhack.org/index.php?topic=69169.0), [Pro Micro + USB Host Shield](https://geekhack.org/index.php?topic=80421.0), maybe more
+Hardware Availability: [GH thread](https://geekhack.org/index.php?topic=72052.0), self-built
 
-See for detail and discussion.
-https://geekhack.org/index.php?topic=69169.0
+Make example for this keyboard (after setting up your build environment):
 
+    make converter-usb_usb-default
 
-Hardware requirement
---------------------
-There are two options.
+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.
 
-### TMK USB-USB Converter
-You can buy a fully assembled converter from me here.
+Getting the Hardware
+--------------------
+There are two options to get a converter: You can buy one from Hasu or build one yourself.
 
-    https://geekhack.org/index.php?topic=69169.0
+### Buy a Converter
+You can buy a fully assembled converter from me here:
+https://geekhack.org/index.php?topic=69169.0
 
-### Arduino Leonardo + Circuit@Home USB Host Shield 2.0
+### Build one yourself using Arduino Leonardo + Circuit@Home USB Host Shield 2.0
 Buying Arduino Leonardo and USB Host Shield 2.0(from Circuit@home) will be better, you won't need even soldering iron.
-
-    http://arduino.cc/en/Main/ArduinoBoardLeonardo 
-    https://www.circuitsathome.com/products-page/arduino-shields/usb-host-shield-2-0-for-arduino-assembled/
+http://arduino.cc/en/Main/ArduinoBoardLeonardo 
+https://www.circuitsathome.com/products-page/arduino-shields/usb-host-shield-2-0-for-arduino-assembled/
 
 Other compatible boards like Arduino's Shield will also work well but I think Sparkfun's needs to be modified.
-
-    http://arduino.cc/en/Main/ArduinoUSBHostShield
-    https://www.sparkfun.com/products/9947
+http://arduino.cc/en/Main/ArduinoUSBHostShield
+https://www.sparkfun.com/products/9947
 
 Also Pro Micro 3.3V(not Mini) or Teensy with mini host shield will work with some fixes on signal/power routing.
+[Build guide](https://geekhack.org/index.php?topic=80421.0)
+https://www.circuitsathome.com/products-page/arduino-shields/usb-host-shield-for-arduino-pro-mini
+https://www.sparkfun.com/products/12587
+https://www.pjrc.com/teensy/td_libs_USBHostShield.html
 
-    https://www.circuitsathome.com/products-page/arduino-shields/usb-host-shield-for-arduino-pro-mini
-    https://www.sparkfun.com/products/12587
-    https://www.pjrc.com/teensy/td_libs_USBHostShield.html
-
-
-
-Build firmware
---------------
-Follow normal QMK build instructions to get a binary file. Flashing depends on you hardware.
-
-Limitation
+Limitations
 ----------
 Only supports 'HID Boot protocol'.
-
 Note that the converter can host only USB "boot protocol" keyboard(6KRO), not NKRO, it is possible to support NKRO keyboard but you will need to write HID report parser for that. Every NKRO keyboard can have different HID report and it is difficult to support all kind of NKRO keyboards in the market.
 
-
-
-Keymap editor
--------------
-You can editor keymap and download firmware with web brwoser.
-
-- http://www.tmk-kbd.com/tmk_keyboard/editor/unimap/?usb_usb
-
-
-
-Update
-------
-2014/12/11  Added Hub support(confirmed with HHKB pro2)
-2016/09/10  Unimap editor support
-2016/10/18  Fix LED state at startup
-2017/08/16  Port to QMK
-
-
-Resource
+Resources
 --------
-USB Host Sheild 2.0
+Hasu's main thread for the converter
+    https://geekhack.org/index.php?topic=69169.0
+Build guide for the Pro Micro variant
+    https://geekhack.org/index.php?topic=80421.0
+Original TMK version of the converter
+    https://github.com/tmk/tmk_keyboard/tree/master/converter/usb_usb
+USB Host Shield 2.0
     https://www.circuitsathome.com/products-page/arduino-shields/usb-host-shield-2-0-for-arduino
     https://www.circuitsathome.com/products-page/arduino-shields/usb-host-shield-for-arduino-pro-mini
-USB Host Sheild 2.0 source
+USB Host Shield 2.0 source
     https://github.com/felis/USB_Host_Shield_2.0
-Arduino USB Host Shield(with bootst converter)
+Arduino USB Host Shield (with bootst converter)
     http://arduino.cc/en/Main/ArduinoUSBHostShield
 Arduino source
     https://github.com/arduino/Arduino/hardware/arduino/{cores,variants}