title: Converting Phoenix 1.2 code to Phoenix 1.3
body: <p>I know changing a Phoenix 1.2 project to Phoenix 1.3 will necessarily entails changing the file structure and the related path code. </p>
  
  <p>However, I don't know some of the changes that need to the code itself apart from restructuring the files. In essence, is it required to make certain changes to the code itself? <strong>If it is required, can you please give me an example of such changes that need to be made to the code?</strong></p>