chore(lint): add prettier-standard on git precommit

Add `git-exec-and-restage`, `husky`, `lint-staged` and `prettier-standard` devDependencies
Add `standard-js` badge to README

Author: medfreeman

README.md

@@ -1,5 +1,7 @@
 # Nuxtent
 
+[![js-standard-style](https://cdn.rawgit.com/standard/standard/master/badge.svg)](http://standardjs.com)
+
 The goal of Nuxtent is to make using Nuxt for content heavy sites as easy as using Jekyll, Hugo, or any other static site generator.
 
 It does in two main ways:

package.json

@@ -26,6 +26,9 @@
     "nuxtent": "bin/nuxtent"
   },
   "scripts": {
+    "#<git hooks>": "handled by husky",
+    "precommit": "lint-staged",
+    "#</git hooks>": "handled by husky",
     "unit": "cross-env NODE_ENV=development karma start test/unit/karma.conf.js",
     "e2e": "cross-env NODE_ENV=test ava --verbose --serial test/e2e",
     "test": "npm run unit --single-run && npm run e2e",
@@ -63,13 +66,17 @@
     "chai": "^4.1.0",
     "cross-env": "^5.0.1",
     "express": "^4.15.3",
+    "git-exec-and-restage": "^1.0.1",
+    "husky": "^0.14.3",
     "jsdom": "^11.1.0",
     "karma": "^1.7.0",
     "karma-mocha": "^1.3.0",
     "karma-rollup-preprocessor": "^4.0.2",
     "karma-sinon-chai": "^1.3.1",
+    "lint-staged": "^4.2.1",
     "mocha": "^3.5.0",
     "nuxt": "^1.0.0-rc11",
+    "prettier-standard": "^6.0.0",
     "request-promise-native": "^1.0.4",
     "rollup": "^0.50.0",
     "rollup-plugin-babel": "^3.0.2",
@@ -84,6 +91,11 @@
     "sinon": "^3.0.0",
     "sinon-chai": "^2.12.0"
   },
+  "lint-staged": {
+    "[!template].js": [
+      "git-exec-and-restage prettier-standard"
+    ]
+  },
   "ava": {
     "require": [
       "babel-register"