more docs & less debugging code

readme.md

@@ -1,3 +1,11 @@
 # Christoph Cullmann's Layout
 
+Derived from the default layout.
 
+Lower and raise layer like in default.
+
+QWERTY layer has home row modifiers.
+
+NAV layer with reverse-T cursors.
+
+CMD/FN layer for extras.

rules.mk

@@ -0,0 +1,3 @@
+# less debugging features
+COMMAND_ENABLE = no
+CONSOLE_ENABLE = no