title: Two modules requiring different versions of angular
body: <p>In my application ionic requires angular version to be 1.5.3 and angular-ui-calendar needs the version to be ~1.4.x .</p>
  
  <p>Since i cannot install 1.4.x version of angular on my machine due to ionic dependency i am getting the following error in calendar.js </p>
  
  <blockquote>
    <p>TypeError: undefined is not a function</p>
  </blockquote>