adds addon module

addon/.eslintrc.json

@@ -0,0 +1,29 @@
+{
+  "extends": "google",
+  "env": {
+    "es6": true,
+    "node": true
+  },
+  "parserOptions": {
+    "ecmaVersion": 2017
+  },
+  "rules": {
+    "no-console": "off",
+    "no-use-before-define": "off",
+    "new-cap": "warn",
+    "max-len": [2, 120, {
+      "ignoreComments": true
+    }],
+    "object-curly-spacing": ["error", "always"],
+    "comma-dangle": [
+        "error",
+        "only-multiline"
+    ],
+    "newline-after-var": "off",
+    "require-jsdoc": "off",
+    "strict": [
+        "error",
+        "never"
+    ]
+  }
+}