title: VueJS app is blank
body: <p>I have started vueJS app cloning this repo <a href="https://github.com/auth0-blog/vue-jwt-authentication" rel="noreferrer">https://github.com/auth0-blog/vue-jwt-authentication</a>. I have developed with that for few days and developed some pages with that. Later realized that it was Vue1.0. I then used <a href="https://github.com/vuejs/vue-migration-helper" rel="noreferrer">https://github.com/vuejs/vue-migration-helper</a> and migrated to vue 2.0. I have fixed all the errors one by one.</p>
  
  <p>Now when I run the app, it just does not show any error but it was empty.
  I dont even get any errors in either browser console or in npm terminal. 
  In the Inspect element, <code>&lt;div id="app"&gt;&lt;/div&gt;</code> was empty. Someone please take some time. I have the code in this repo here. <a href="https://bitbucket.org/AswinKP/vuesample" rel="noreferrer">https://bitbucket.org/AswinKP/vuesample</a>. I am sharing the entire repo because I cant just figure out where I am making a mistake.  </p>
  
  <p>I have researched for this and cant find any such issues. 
  I am a beginner in vue js and I am struggling in this for last two days. Thanks in advance.</p>