title: ad hoc build and signer not valid issue
body: <p>I am trying to make an ad hoc build, but I get this "the signer is not valid" error when people try to sync my app to their ipad.  I'm getting confused because I look around and there is mention of this "Entitlements.plist" file that is not mentioned at all on this page in the provisioning portal:</p>
  
  <p><a href="https://developer.apple.com/ios/manage/distribution/distribution.action" rel="nofollow">https://developer.apple.com/ios/manage/distribution/distribution.action</a></p>
  
  <p>Do I have the wrong how-to page?  I followed that page correctly, I thought, but am having a hard time testing what exactly is wrong because on my ipads I get this team provisioning profile which seems to make everything work ok (I can't get the error).  Could the problem be that in my Target's GetInfo I had the Code Signing Identity's "Any iOS Device" field set to iPhone Developer and not to the Ad Hoc Provision item?</p>
  
  <p>Or do I need this entitlements plist file that isn't mentioned in the link above?</p>