title: Migration from angular 1.2 to 1.5
body: <p>Currently I am using angular v1.2.26. When I upgraded it to v1.5.0(or v.1.4.8), the application stopped working.</p>
  
  <p>What are the changes in the existing code of v1.2.26, I should not be missing, to make the application work?</p>