readme added

keyboard/ergodox_ez/keymaps/adnw/k_o_y/readme.md

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+# Basic implementation for k.o,y variant of the adnw layout
+
+adnw is a layout optimised for usage with german and english language
+k.o,y is a variant of this layout
+http://www.adnw.de/index.php?n=Main.SeitlicheNachbaranschl%C3%A4ge
+
+The os must use the de_DE layout