Add linting with eslint

.eslintrc

@@ -0,0 +1,24 @@
+{
+    "parser": "babel-eslint",
+    "env": {
+        "browser": true,
+        "node": true,
+        "es6": true
+    },
+    "parserOptions": {
+        "ecmaFeatures": {
+            "blockBindings": true,
+            "forOf": true
+        }
+    },
+    "rules": {
+        "no-unused-vars": ["error", { "vars": "all", "args": "after-used" }],
+        "comma-dangle": 0,
+        "indent": ["error", 4, {SwitchCase: 1}],
+        "quotes": [2, "double", "avoid-escape"],
+        "semi": [2, "always"],
+        "camelcase": [0],
+        "no-console": [0],
+        "object-curly-spacing": [0]
+    }
+}

package.json

@@ -70,6 +70,7 @@
     "babel-eslint": "^7.1.1",
     "browserify": "^13.1.0",
     "esdoc": "^0.4.3",
+    "eslint": "^3.14.1",
     "mocha": "^3.2.0",
     "uglifyjs": "^2.4.10"
   }