title: phonegap 3 barcodeScanner & undefined error
body: <p>I'm trying to get barcodeScanner working on my phonegap iOS app.  It <em>appears</em> to have been installed correctly (i used plugman), but when i do the javascript call to barcodescanner as per their directions, I simply get "undefined" returned.  I can see that the js is loading properly-- if i console log scanner.scan, I get a dump of the function, but if I do something like this: scanner.scan(function(){alert("yay")}, function(){alert("boo")});  i simply receive back "undefined".  </p>
  
  <p>I feel like i am missing something really simple here... any help?</p>