add eslint

manual/.eslintrc.json

@@ -0,0 +1,28 @@
+{
+    "env": {
+        "es6": true,
+        "node": true
+    },
+    "extends": "eslint:recommended",
+    "parserOptions": {
+        "sourceType": "module"
+    },
+    "rules": {
+        "indent": [
+            "error",
+            2
+        ],
+        "linebreak-style": [
+            "error",
+            "unix"
+        ],
+        "quotes": [
+            "error",
+            "single"
+        ],
+        "semi": [
+            "error",
+            "always"
+        ]
+    }
+}

manual/keyboardInvoker.js

@@ -12,7 +12,7 @@ class KeyboardInvoker {
   listen() {
     process.stdin.on('keypress', (ch, key) => {
       this.execute(key.name);
-    })
+    });
   }
 
   execute(commandName) {

manual/package.json

@@ -4,12 +4,16 @@
   "description": "",
   "scripts": {
     "start": "node main.js",
+    "eslint": "eslint \"*.js\"",
     "test": "echo \"Error: no test specified\" && exit 1"
   },
   "author": "",
   "license": "MIT",
   "dependencies": {
     "johnny-five": "^0.10.6",
     "keypress": "^0.2.1"
+  },
+  "devDependencies": {
+    "eslint": "^3.11.1"
   }
 }