title: creating ipa file using command line with code signing
body: <p>I am trying to create an ipa file using xcode command line including signing.
  i tried searching for it, i got the commands to create ipa with out code signing.</p>
  
  <p>i need the commands mainly to integrate with hudson CI.</p>
  
  <p>Please suggest.</p>
  
  <p>-Prahasa</p>