Fix code quality tools configuration and update documentation

.eslintrc.json

@@ -0,0 +1,19 @@
+{
+  "env": {
+    "browser": true,
+    "jquery": true,
+    "es6": true
+  },
+  "extends": "eslint:recommended",
+  "parserOptions": {
+    "ecmaVersion": 2018,
+    "sourceType": "module"
+  },
+  "rules": {
+    "indent": ["error", 2],
+    "linebreak-style": ["error", "unix"],
+    "quotes": ["error", "single"],
+    "semi": ["error", "always"]
+  },
+  "ignorePatterns": ["vendor/**", "node_modules/**", "build/**", "dist/**", "bin/**"]
+}