Issue #813. Add .eslintrc and eslint grunt task (basic config for now).

.eslintrc

@@ -0,0 +1,24 @@
+{
+    "rules": {
+        "indent": [
+            2,
+            4
+        ],
+        "quotes": [
+            2,
+            "double"
+        ],
+        "linebreak-style": [
+            2,
+            "unix"
+        ],
+        "semi": [
+            2,
+            "always"
+        ]
+    },
+    "env": {
+        "browser": true
+    },
+    "extends": "eslint:recommended"
+}

grunt-tasks/eslint.js

@@ -0,0 +1,12 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+module.exports = function(grunt) {
+  grunt.config('eslint', {
+      target: [
+        '<%= jsPath %>/lib/*.js',
+        'tests/functional/*.js'
+      ]
+   });
+};