Upgrade ESLint to v2

This commit also tweak the code style following backward-incompatible v2 rules.

.eslintrc.json

@@ -0,0 +1,121 @@
+{
+  "extends": "eslint:recommended",
+  "env": {
+    "es6": true,
+    "node": true,
+    "browser": true
+  },
+  "parserOptions": {
+    "ecmaVersion": 6,
+    "sourceType": "module",
+    "ecmaFeatures": {
+      "experimentalObjectRestSpread": true
+    }
+  },
+  "rules": {
+    "strict": 0,
+    "no-undef": 2,
+    "accessor-pairs": 2,
+    "comma-dangle": [2, "always-multiline"],
+    "consistent-return": 2,
+    "dot-notation": 2,
+    "eqeqeq": 2,
+    "indent": [2, 2],
+    "no-cond-assign": 2,
+    "no-constant-condition": 2,
+    "no-eval": 2,
+    "no-inner-declarations": [0],
+    "no-unneeded-ternary": 2,
+    "radix": 2,
+    "semi": [2, "always"],
+    "camelcase": 2,
+    "comma-spacing": 2,
+    "comma-style": 2,
+    "eol-last": 2,
+    "linebreak-style": [2, "unix"],
+    "new-parens": 2,
+    "no-lonely-if": 2,
+    "no-multiple-empty-lines": 2,
+    "no-nested-ternary": 2,
+    "no-spaced-func": 2,
+    "no-trailing-spaces": 2,
+    "operator-linebreak": 2,
+    "quotes": [2, "single"],
+    "semi-spacing": 2,
+    "space-unary-ops": 2,
+    "arrow-parens": 2,
+    "arrow-spacing": 2,
+    "no-class-assign": 2,
+    "no-dupe-class-members": 2,
+    "no-var": 2,
+    "object-shorthand": 2,
+    "prefer-const": 2,
+    "prefer-spread": 2,
+    "prefer-template": 2
+  },
+  "globals": {
+    "Meteor": false,
+    "Session": false,
+    "HTML": false,
+    "check": false,
+    "Tracker": false,
+    "Blaze": false,
+    "Accounts": false,
+    "Match": false,
+    "Mongo": false,
+    "Random": false,
+    "ReactiveVar": false,
+    "Email": false,
+    "Template": false,
+    "$": false,
+    "_": false,
+    "autosize": false,
+    "Avatar": true,
+    "Avatars": true,
+    "BlazeComponent": false,
+    "BlazeLayout": false,
+    "DocHead": false,
+    "ESSearchResults": false,
+    "FastRender": false,
+    "FlowRouter": false,
+    "FS": false,
+    "getSlug": false,
+    "Migrations": false,
+    "moment": false,
+    "Mousetrap": false,
+    "Picker": false,
+    "Presence": true,
+    "presences": true,
+    "Ps": true,
+    "ReactiveTabs": false,
+    "Restivus": false,
+    "SimpleSchema": false,
+    "SubsManager": false,
+    "T9n": false,
+    "TAPi18n": false,
+    "AccountsTemplates": true,
+    "Activities": true,
+    "Attachments": true,
+    "Boards": true,
+    "CardComments": true,
+    "Cards": true,
+    "Lists": true,
+    "UnsavedEditCollection": true,
+    "Users": true,
+    "CSSEvents": true,
+    "EscapeActions": true,
+    "Filter": true,
+    "Mixins": true,
+    "Modal": true,
+    "MultiSelection": true,
+    "Popup": true,
+    "Sidebar": true,
+    "Utils": true,
+    "InlinedForm": true,
+    "UnsavedEdits": true,
+    "Notifications": true,
+    "allowIsBoardAdmin": true,
+    "allowIsBoardMember": true,
+    "Emoji": true
+  }
+}