title: Not able to create a build definition for a specific branch
body: <p>I am using Visual Studio Team Services 2015 and I have multiple branches of the source code. I did not have any trouble in branching out the source code, however, I would like to implement Continuous Integration so as to automate the build process. However, I am not able to create a build definition for specific branch. Below are the links to the screenshots. You can see that I have Main branch (trunk/working copy) and version 1.0 branch (released version). However, the branch selection is not available while creating build definition.</p>
  
  <p><a href="http://i.stack.imgur.com/XmU6S.png" rel="nofollow">Branches</a></p>
  
  <p><a href="http://i.stack.imgur.com/t5Fnc.png" rel="nofollow">Build Definition</a></p>