title: Xcode playgrounds can't access swift files in Sources folder
body: <p>I just upgraded to Xcode 6.3 and they offered something new to the Playgrounds.  If you make a new playgrounds and you open the project navigator, you will see a Sources folder and inside that there is a "SupportCode.swift" file.  At the top of that file it reads</p>
  
  <blockquote>
    <p>This file (and all other Swift source files in the Sources directory of this playground) will be precompiled into a framework which is automatically made available to .playground.</p>
  </blockquote>
  
  <p>I tried putting a function in to there and it is not available to my playground.  What am I doing wrong?  Do I have to manually compile the SupportCode.swift file manually?  How?</p>