handwired/CMD60 Refactor, Configurator support and readme update (#4632)

* handwired/CMD60: refactor

- renamed layout macro KEYMAP to LAYOUT
- removed K2C, K3B and K3C locations (indications are these locations were unused in hardware)
- keymap
  - now uses #include QMK_KEYBOARD_H
  - converted keycodes to short format
  - deleted TMK fn_actions and action_get_macro blocks
  - white space changes (readability/alignment)

* handwired/CMD60: Configurator support

* handwired/CMD60: readme update

- updated to conform to current QMK template
- added image and build gallery links

* handwired/cmd60: rename all files and folders to lowercase

keyboards/handwired/cmd60/readme.md

@@ -0,0 +1,19 @@
+# CMD60
+
+![CMD60](https://i.imgur.com/r9LA6Lx.jpg)
+
+This layout has been designed to optimize use of the left-hand, and it focussed specifically on programmers who work
+with text editors like SublimeText and Atom. It utilizes the power of Space_fn, and features a caps lock swap for Fn2
+and enter key on tap. These features allow you to keep your right hand on the mouse more and should enable you to
+achieve a higher level of productivity if you take the time to learn its function layers.
+
+[Build Log](https://redd.it/4mkuu8)
+
+Keyboard Maintainer: [The QMK Community](https://github.com/qmk)  
+Hardware Supported: CMD60 handwired, Teensy 2.0  
+
+Make example for this keyboard (after setting up your build environment):
+
+    make handwired/cmd60:default
+
+See the [build environment setup](https://docs.qmk.fm/#/getting_started_build_tools) and the [make instructions](https://docs.qmk.fm/#/getting_started_make_guide) for more information. Brand new to QMK? Start with our [Complete Newbs Guide](https://docs.qmk.fm/#/newbs).