evil80: Add readme.md file

keyboards/evil80/readme.md

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+# Evil 80
+
+![Evil 80](https://i.imgur.com/f5dKuML.jpg)
+
+Also known as the Odyssey, the Evil 80 is a QMK-powered aluminum TKL keyboard featuring an Aviator connector cable. Sold via a Geekhack group buy in January of 2018.
+
+Keyboard Maintainer: [The QMK Community](https://github.com/qmk)  
+Hardware Supported: Evil 80-Odyssey QMK version  
+Hardware Availability: [Geekhack](https://geekhack.org/index.php?topic=93434.0)
+
+Make example for this keyboard (after setting up your build environment):
+
+    make evil80: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).